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2018

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Articles 511 - 540 of 812

Full-Text Articles in Entomology

First Records Of Aethes Heleniana (Lepidoptera: Tortricidae) In Wisconsin., Steven J. Krauth Jan 2018

First Records Of Aethes Heleniana (Lepidoptera: Tortricidae) In Wisconsin., Steven J. Krauth

The Great Lakes Entomologist

Aethes heleniana was reared from Helenium autumnale in Wisconsin. This is the first record of A. heleniana Razowski from Wisconsin and the U.s. and the larval food plant H. autumnale is reported for the first time.


Mantis Religiosa (Mantodea: Mantidae) In Door County, Wisconsin, Mark A. Kisselburg, Philip A. Cochran Jan 2018

Mantis Religiosa (Mantodea: Mantidae) In Door County, Wisconsin, Mark A. Kisselburg, Philip A. Cochran

The Great Lakes Entomologist

The European mantid (Mantis religiosa) has been observed at several sites spanning a distance of approximately 50 km in northern Door County, Wisconsin. A reliable sighting of an unidentified praying mantid on Chambers Island in Green Bay suggests the possibility that the species occurs there as well. Lake-induced moderation of the Door County climate may have resulted in conditions especially conducive for the establishment of European mantids.


Biological Control Of Alfalfa Blotch Leafminer (Diptera: Agromyzidae) In Ontario: Status And Ecology Of Parasitoids (Hymenoptera: Braconidae, Eulophidae) 20 Years After Introduction, George E. Heimpel, Francois Meloche Jan 2018

Biological Control Of Alfalfa Blotch Leafminer (Diptera: Agromyzidae) In Ontario: Status And Ecology Of Parasitoids (Hymenoptera: Braconidae, Eulophidae) 20 Years After Introduction, George E. Heimpel, Francois Meloche

The Great Lakes Entomologist

Two European parasitoid species were released in Ontario during the late 1970's to control the alfalfa blotch leafminer, Agromyza frontella (Rondani) (Diptera: Agromyzidae). One of these, Dacnusa dryas (Nixon) (Hymenoptera: Braconidae), rapidly became established and the other, Chrysocharis liriomyzae (= C. punctifacies) (Delucchi) (Hymenoptera: Eulophidae) was never recovered in Ontario. In 1999, we found both D. dryas and C. liriomyzae parasitizing first-generation A. frontella in Ontario in 1999. The combined parasitism rate for both species as revealed by larval dissections was 97.5% by the end of the first A. frontella generation. Of the adult parasitoids reared, 86% were D. dryas …


Studies On The Life Cycle And Transmission Of Cougourdella Sp., A Microsporidian Parasite Of Glossosoma Nigrior (Trichoptera: Glossosomatidae), Jeffrey S. Heilveil, Steven L. Kohler, Leellen F. Solter Jan 2018

Studies On The Life Cycle And Transmission Of Cougourdella Sp., A Microsporidian Parasite Of Glossosoma Nigrior (Trichoptera: Glossosomatidae), Jeffrey S. Heilveil, Steven L. Kohler, Leellen F. Solter

The Great Lakes Entomologist

The trichopteran Glossosoma nigrior, the dominant benthic invertebrate grazer in Michigan trout streams, hosts a microsporidian (Protozoa) pathogen, Cougourdella sp., which strongly regulates the population density of larvae in the stream. In order to better understand the interactions between these two species, two possible modes of pathogen transmission, oral and transovum, were investigated. While both sexes of adult G. nigrior were found to be infected with mature environmental spores, spores were not found associated with reproductive tissue. This suggests that transovum transmission does not occur in this system. Glossosoma nigrior, when ex- posed to viable spores taken from …


Decline Of Gomphus Fraternus Fraternus (Odonata: Gomphidae) In Lake Erie, Paul M. Catling Jan 2018

Decline Of Gomphus Fraternus Fraternus (Odonata: Gomphidae) In Lake Erie, Paul M. Catling

The Great Lakes Entomologist

Collections and literature reports indicate that Gomphus fraternus fraternus was abundant on the shoreline of Lake Erie prior to 1960, and "tens of thousands" were reported at Long Point Bay. After 1960 there were no reports from the shoreline, although there have been a number of comprehensive studies that have included the shoreline area and a number of Odonata specialists have also visited the Lake Erie shoreline regularly. A survey of portions of the Lake Erie shoreline, including the Long Point Bay area in 1999 and 2000, during the established peak and late peak flight period in southwestern Ontario, did …


Comparison Of Two Population Sampling Methods Used In Field Life History Studies Of Mesovelia Mulsanti (Heteroptera: Gerromorpha: Mesoveliidae) In Southern Illinois, Steven J. Taylor, J. E. Mcpherson Jan 2018

Comparison Of Two Population Sampling Methods Used In Field Life History Studies Of Mesovelia Mulsanti (Heteroptera: Gerromorpha: Mesoveliidae) In Southern Illinois, Steven J. Taylor, J. E. Mcpherson

The Great Lakes Entomologist

A field life history study of Mesovelia mulsanti was conducted in south­ern Illinois, the results of which are compared with those from an earlier study also conducted in southern Illinois. The two studies differed in the collecting techniques used (quadrat sampler versus aquatic net). Results of the present study give a clearer picture of the life history of this insect be­ cause the quadrat sampler collected representative samples of nymphs and adults more effectively than the aquatic net and, thus, the quadrat samples more accurately represented the actual chronology of the annual generations.


Distribution Of First Instar Gypsy Moths (Lepidoptera: Lymantriidae) Among Saplings Of Four Tree Species Common In The Great Lakes Region, J. L. Stoyenoff, J. A. Witter Jan 2018

Distribution Of First Instar Gypsy Moths (Lepidoptera: Lymantriidae) Among Saplings Of Four Tree Species Common In The Great Lakes Region, J. L. Stoyenoff, J. A. Witter

The Great Lakes Entomologist

We examined the inter-tree distribution of first instar gypsy moth larvae under natural dispersal conditions in the field in Michigan in 1991. The study focused on saplings of northern red oak (Quercus rubra), white oak (Q. alba), red maple (Acer rubrum), and witch-hazel (Hamamelis virginiana), which are common understory components of forests in the Great Lakes region. Large-volume trees with foliage that is well-developed early in the spring should provide an excellent surface area for catching newly-hatched gypsy moth larvae, which are randomly dispersed by wind in the spring around the time of leaf flush or …


Libellula Flavida (Odonata: Libellulidae), A Dragonfly New To Ohio, Tom D. Schultz Jan 2018

Libellula Flavida (Odonata: Libellulidae), A Dragonfly New To Ohio, Tom D. Schultz

The Great Lakes Entomologist

Libellula flavida, a widespread but uncommon dragonfly of southeastern and south central North America, is now recorded from Ohio. A breeding population was discovered in an acidic fen on the site of a sandstone quarry in southern Ohio.


New Distribution Records Of Ground Beetles From The North Central United States (Coleoptera: Carabidae), Foster Forbes Purrington, Daniel K. Young, Kirk J. Larsen, Jana Chin-Ting Lee Jan 2018

New Distribution Records Of Ground Beetles From The North Central United States (Coleoptera: Carabidae), Foster Forbes Purrington, Daniel K. Young, Kirk J. Larsen, Jana Chin-Ting Lee

The Great Lakes Entomologist

We report 39 ground beetles new to five states in the upper midwestern United States. These species records include 19 new to Illinois (all but one from Lake County), 11 from Iowa, three from South Dakota, eight from Wisconsin, and two from Michigan. (Three species are new to more than one state). Enigmatically disjunct collections include the myrmecophile, Helluomorphoides nigripennis from western Illinois, known previously only from the Atlantic and Gulf coastal plain and piedmont, and Chlaenius amoenus, reported only from southeastern states and now from northeast Iowa.


Leucanthiza Dircella (Lepidoptera: Gracillariidae): A Leafminer Of Leatherwood, Dirca Palustris, Toby R. Petrice, Robert A. Haack, William J. Mattson, Bruce A. Birr Jan 2018

Leucanthiza Dircella (Lepidoptera: Gracillariidae): A Leafminer Of Leatherwood, Dirca Palustris, Toby R. Petrice, Robert A. Haack, William J. Mattson, Bruce A. Birr

The Great Lakes Entomologist

Leatherwood, Dirca palustris (Thymelaeaceae), is an understory shrub ranging throughout most of the eastern and central United States and adjacent Canada. During 1997-1999, we conducted studies to identify and assess the impact of a leafminer that was causing significant damage to leather- wood plants in eastern Gogebic County, Michigan. Leucanthiza dircella was identified as the only insect responsible for the leaf mining activity on leatherwood. In northern Michigan, L. dircella completed one generation per year. Adult moths were captured on yellow sticky panels suspended from leatherwood branches. In 1997 and 1998, most adults were captured during the first sampling period …


Seasonal Occurrence Of The Sod Webworm Moths (Lepidoptera: Crambidae) Of Ohio, Harry D. Niemczyk, David J. Shetlar, Kevin T. Power, Douglas S. Richmond Jan 2018

Seasonal Occurrence Of The Sod Webworm Moths (Lepidoptera: Crambidae) Of Ohio, Harry D. Niemczyk, David J. Shetlar, Kevin T. Power, Douglas S. Richmond

The Great Lakes Entomologist

While nearly 100 species of sod webworms are known to occur in North America, the species complex and seasonal occurrence of these moths has been documented in relatively few states. For Ohio, there is little published record of the sod webworm species complex, and the seasonal occurrence of only a few economically important species has been documented. Using black light traps, sod web worm adult flight activity was monitored over the course of three to five years at four different locations throughout Ohio. In this paper we report the seasonal occurrence of sod web worms species captured at these locations. …


Arhyssus Hirtus (Hemiptera: Heteroptera: Rhopalidae) In Minnesota: The Inland Occurrence Of An East Coast Species, John D. Lattin, John Haarstad Jan 2018

Arhyssus Hirtus (Hemiptera: Heteroptera: Rhopalidae) In Minnesota: The Inland Occurrence Of An East Coast Species, John D. Lattin, John Haarstad

The Great Lakes Entomologist

Arhyssus hirtus (Hemiptera: Heteroptera: Rhopalidae), is reported from the Cedar Creek Natural History Area, a Long-Term Ecological Research site, outside of Minneapolis, Minnesota where over 4000 species of arthropods have been collected. This species has previously been known only from a narrow zone along the sandy edges of the Atlantic Ocean (Maryland, Massachusetts, New Jersey and New York). The species is known on Hudsonia tomentosa at these ocean sites, but other hosts may be involved at Cedar Creek. This small species of Arhyssus occurs in both micropterous and macropterous forms, unusual for this genus. Thus far, only micropterous forms have …


New Distribution Record For The Endangered Crawling Water Beetle Brychius Hungerfordi (Coleoptera: Haliplidae) And Notes On Seasonal Abundance And Food Preferences, Michael Grant, Robert Vande Kopple, Bert Ebbers Jan 2018

New Distribution Record For The Endangered Crawling Water Beetle Brychius Hungerfordi (Coleoptera: Haliplidae) And Notes On Seasonal Abundance And Food Preferences, Michael Grant, Robert Vande Kopple, Bert Ebbers

The Great Lakes Entomologist

The Federally beetle, Brychius hungerfordi, has been discovered at a new location in Northern Lower Peninsula of Michigan. We also report preliminary data on a seasonal variation in relative abundance and on its possible food plants.


Wisconsin Cydnidae (Hemiptera: Heteroptera), Andrew H. Williams Jan 2018

Wisconsin Cydnidae (Hemiptera: Heteroptera), Andrew H. Williams

The Great Lakes Entomologist

Notes on 17 species of Wisconsin Cydnidae taken from specimens in the University of Wisconsin-Madison Insect Research Collection are included in this faunal list. Genera include Amnestus, Corimelaena, Cydnoides, Galgupha, Melanaethes, Microporus, Tominotus and Sehirus.


New Michigan Tick (Acari: Ixodidae) And Flea (Siphonaptera: Ceratophyllidae) Records From Colonial Nesting Birds, William C. Scharf Jan 2018

New Michigan Tick (Acari: Ixodidae) And Flea (Siphonaptera: Ceratophyllidae) Records From Colonial Nesting Birds, William C. Scharf

The Great Lakes Entomologist

Banding and censusing large numbers of gull chicks over a 30-year period on Great Lakes islands has produced a collection of five individual ticks from two Herring Gull (Larus argentatus) chicks. The tick species, Hemaphysalis leporispalustris, found on the gulls is commonly found on Snowshoe Hares (Lepus americanus). Although this represents an apparently uncom­mon record on Herring Gulls, this host could be an important source of aerial vector dispersal during regular cyclic hare/tick population peaks. Populations of the flea, Ceratophyllus lari, have increased rapidly in ground nesting Double-crested Cormorant (Phalacrocorax auritus) colonies from none 16 years ago. The …


Color, Bacteria, And Mosquito Eggs As Ovipositional Attractants For Aedes Aegypti And Aedes Albopictus (Diptera: Culicidae), Steven G. Pavlovich, C. Lee Rockett Jan 2018

Color, Bacteria, And Mosquito Eggs As Ovipositional Attractants For Aedes Aegypti And Aedes Albopictus (Diptera: Culicidae), Steven G. Pavlovich, C. Lee Rockett

The Great Lakes Entomologist

Selected bacterial washes, color, and mosquito eggs were comparatively examined as ovipositional attractants for Aedes aegypti and Aedes albopictus. Any evidence of additive activity was noted. All colored washes alone were preferred over selected bacterial washes. The combinations of color and bacteria in a single wash were better attractants for oviposition than colored washes alone. The bacterial content of the breeding water was a more important factor than egg presence in oviposition site selection.


Life History Of Ceratocombus Vagans (Hemiptera: Heteroptera: Ceratocombidae), With Notes On The Immature Stages, John D. Lattin Jan 2018

Life History Of Ceratocombus Vagans (Hemiptera: Heteroptera: Ceratocombidae), With Notes On The Immature Stages, John D. Lattin

The Great Lakes Entomologist

The biology and life stages of Ceratocombus vagans are given together with distributional notes. The current systematic position of Ceratocombidae is reviewed. This species is one of the most generalized Hemiptera: Heteroptera known. Its predatory habits lend credance to the idea that primitive Hemiptera: Heteroptera were predaceous as suggested by Stys and others. Ceratocombus vagans occurs in moss, leaf litter, and under loose bark. It has wide distribution in much of North America.


New Records Of Rhopalosomatidae (Hymenoptera: Vespoidea) From Wisconsin, Steven J. Krauth Jan 2018

New Records Of Rhopalosomatidae (Hymenoptera: Vespoidea) From Wisconsin, Steven J. Krauth

The Great Lakes Entomologist

The rhopalosomatid Olixon banksii is recorded from Wisconsin for the first time.


Sperm Depletion And Mating Behavior In The Parasitoid Wasp Spalangia Cameroni (Hymenoptera: Pteromalidae), Bethia H. King Jan 2018

Sperm Depletion And Mating Behavior In The Parasitoid Wasp Spalangia Cameroni (Hymenoptera: Pteromalidae), Bethia H. King

The Great Lakes Entomologist

Mating behavior was examined in the parasitoid wasp Spalangia cameroni. Males attempted copulation with both virgins and already mated females. Males attempted copulation regardless of whether they still had sperm. Already mated females rejected attempts to mate again but virgin females would mate 'with males regardless of whether or not they had sperm left. Males mated with 12-52 females before exhausting their sperm sup- plies. Males that had mated only once daily exhausted their sperm supplies in their late thirties (days old), if ever; and males that had mated four times daily exhausted their's at 7-13 days. Males produced …


Eutarsopolipus Davidsoni N. Sp. (Acari: Podapolipidae) From Chlaenius Sericeus (Coleoptera: Carabidae) From Ingham County, Michigan, And Redescription Of Male Eutarsopolipus Regenfussi, Robert W. Husband Jan 2018

Eutarsopolipus Davidsoni N. Sp. (Acari: Podapolipidae) From Chlaenius Sericeus (Coleoptera: Carabidae) From Ingham County, Michigan, And Redescription Of Male Eutarsopolipus Regenfussi, Robert W. Husband

The Great Lakes Entomologist

A new species of podapolipid mite from Michigan, Eutarsoplipus davidsani (Acari: Podapolipidae) is described, illustrated and compared with related species of Eutarsopolipus in the Myzus group. Eutarsopolipus davidsani is an ectoparasite of Chlaenius sericeus (Coleoptera: Carabidae). Keys to genera and groups of podapolipid mite parasites of Carabidae and keys to 11 species in the Myzus group of Eutarsopolipus are provided. The male stage of E. regenfussi Husband and Swihart 1986 is redescribed from specimens taken from the type host, Chlaenius pennsylvanicus.


Richness And Abundance Of Carabidae And Staphylinidae (Coleoptera), In Northeastern Dairy Pastures Under Intensive Grazing, R. A. Byers, G. M. Barker, R. L. Davidson, E. R. Hoebeke, M A. Sanderson Jan 2018

Richness And Abundance Of Carabidae And Staphylinidae (Coleoptera), In Northeastern Dairy Pastures Under Intensive Grazing, R. A. Byers, G. M. Barker, R. L. Davidson, E. R. Hoebeke, M A. Sanderson

The Great Lakes Entomologist

Dairy cattle has become popular to dairy farmers in the Northeast looking for management schemes to cut production costs. Carabidae (ground beetles) and Staphylinidae (rove beetles) are indicators of habitat disturbances, such as drainage of wetlands, or grassland for grazing animals, and their monitoring could provide one measure of ecosystem sustainability if intensive management systems expand or intensify in the future. Our objective was assess the abundance and species richness of these two beetle families under intensive grazing throughout Pennsylvania, southern New York and Vermont. We collected 4365 ground beetles (83 species) and 4,027 rove beetles (79 species) by pitfall …


Dispersal And Re-Capture Of Marked, Overwintering Tomicus Piniperda (Coleoptera: Scolytidae) From Scotch Pine Bolts, A. V. Barak, D. Mcgrevy, G. Tokaya Jan 2018

Dispersal And Re-Capture Of Marked, Overwintering Tomicus Piniperda (Coleoptera: Scolytidae) From Scotch Pine Bolts, A. V. Barak, D. Mcgrevy, G. Tokaya

The Great Lakes Entomologist

The pine shoot beetle (PSB), Tomicus piniperda is a recently established exotic pest of live pine in the southern Great Lakes of the U.S. and Canada. Scotch pine, Pinus sylvestris L. is the most susceptible pine species, but the adult also attacks several other North American species of Pinus. This research investigated the dispersal behavior of beetles emerging from overwintering sites to aid in the development of effective monitoring and management practices. Scotch pine logs with overwintering PSB were sprayed with fluorescent pigments to mark dispersing beetles. These logs were placed in piles in the centers of three circular …


Seasonal Shoot-Feeding By Tomicus Piniperda (Coleoptera: Scolytidae) In Michigan, Robert A. Haack, Robert K. Lawrence, George C. Heaton Jan 2018

Seasonal Shoot-Feeding By Tomicus Piniperda (Coleoptera: Scolytidae) In Michigan, Robert A. Haack, Robert K. Lawrence, George C. Heaton

The Great Lakes Entomologist

Seasonal shoot-feeding by Tomicus piniperda (L.) was monitored at 2­ week intervals on 15 Scotch pine, Pinus sylvestris L., trees from 8 April through 16 November 1994 in southern Michigan. All shoots that showed evidence of T. piniperda attack were removed every two weeks. In 1994, initial spring flight of T. piniperda began on 22 March. At least two live T. piniperda adults were found on the 15 trees on each sampling date from 8 April through 1 November 1994. In addition, at least one freshly attacked, beetle- free shoot was found on each sampling date except for 1 November. …


Variation In Timing And Abundance Of Elfins (Callophrys) (Lepidoptera: Lycaenidae) In Wisconsin During 1987-1999, Ann B. Swengel, Scott R. Swengel Jan 2018

Variation In Timing And Abundance Of Elfins (Callophrys) (Lepidoptera: Lycaenidae) In Wisconsin During 1987-1999, Ann B. Swengel, Scott R. Swengel

The Great Lakes Entomologist

In Wisconsin during 1987-1999, we recorded elfin (Callophrys) individuals on 154 of 254 observation dates between 2 April and 11 July. The frosted elfin (C. irus) occurred only in central Wisconsin; brown (C. augustinus), hoary (C. polios), and Henry's (c. henrici) elfins in central and northern Wisconsin; and eastern pine elfin (C. niphon) from southern to northern Wisconsin. Most individuals were eastern pine elfins, which occurred at the most sites, while Henry's elfin had the fewest individuals and sites. All five elfins occurred in the most frequently visited subregion (central Wisconsin), where they all had similar median …


First Record Of Tachysphex Pechumani (Hymenoptera: Sphecidae) From Indiana, Frank E. Kurczewski Jan 2018

First Record Of Tachysphex Pechumani (Hymenoptera: Sphecidae) From Indiana, Frank E. Kurczewski

The Great Lakes Entomologist

A nesting population of Tachysphex pechumani is recorded from near Indiana Dunes National Lakeshore, Porter County, Indiana. This record is a western extension of the known range of this uncommon species. Nesting biology of T. pechumani at this locality was similar to previously published observations on this species.


Wheat Stem Maggot In Spring Wheat-Alfalfa Intercrops With Different Crop Management Intensities, Louis S. Hesler, Robert W. Kieckhefer Jan 2018

Wheat Stem Maggot In Spring Wheat-Alfalfa Intercrops With Different Crop Management Intensities, Louis S. Hesler, Robert W. Kieckhefer

The Great Lakes Entomologist

Larval infestations and adult counts of wheat stem maggot (Meormyza americana) were each compared among plots of intercropped spring wheat and alfalfa grown under high, intermediate, or low crop management intensity (CMI). CMI varied primarily in the amounts of nitrogen fertilizer, herbicide, and tillage used. Infestation of wheat plants was measured from 1990 through 1993 as the percentage of white grain heads caused by larval feeding within the stems. Adult counts were made from sweep net samples within plots 3 to 5 times per year from 1991 through 1993. Larval infestation varied among years but not by CMI. The mean …


Abundance Of Cereal Aphids (Homoptera: Aphididae) And Their Predators In Spring Wheat-Alfalfa Intercrops Under Different Crop Management Intensities, Louis S. Hesler, Robert W. Kieckhefer, Paul D. Evenson Jan 2018

Abundance Of Cereal Aphids (Homoptera: Aphididae) And Their Predators In Spring Wheat-Alfalfa Intercrops Under Different Crop Management Intensities, Louis S. Hesler, Robert W. Kieckhefer, Paul D. Evenson

The Great Lakes Entomologist

Natural infestations of cereal aphids and abundance of their predators were compared from 1990 through 1993 among plots of intercropped spring wheat and alfalfa grown under high, intermediate, or low crop management intensity (CMI). CMI treatments differed in the amount of nitrogen fertilizer applied and herbicide used and in the rigor of tillage operations. Cereal aphids (primarily Rhopalosiphum padi, Sitobion avenae, and Schizaphis graminum) collectively infested a mean of 0 to 5.9 of 15 wheat tillers sam­pled per plot on various dates from 1990 through 1993, but aphid infestation did not vary by CM!. Seven taxa of aphid …


Tomicus Piniperda (Coleoptera: Scolytidae): Is Shoot Feeding Required For Reproductive Maturation?, Therese M. Poland, Robert A. Haack Jan 2018

Tomicus Piniperda (Coleoptera: Scolytidae): Is Shoot Feeding Required For Reproductive Maturation?, Therese M. Poland, Robert A. Haack

The Great Lakes Entomologist

The pine shoot beetle, Tomicus piniperda (Coleoptera: Scolytidae), is a univoltine pest of pine in its native range of Europe and Asia. Tomicus piniperda is now widely established in the Great Lakes region and poses a potentially significant threat to other pine-producing areas in North America. An unusual aspect of the life history of T. piniperda is the extended period of maturation-feeding that takes place in the shoots of living pine trees and subsequent overwintering before adults reproduce the following year. We investigated the extent to which shoot-feeding is required by newly-emerged T. piniperda before introduction into Scotch pine (Pinus …


Heterospecific Hymenoptera Found Inside The Nests Of Bombus Impatiens (Hymenoptera: Apidae)., Kelsey K. Graham Jan 2018

Heterospecific Hymenoptera Found Inside The Nests Of Bombus Impatiens (Hymenoptera: Apidae)., Kelsey K. Graham

The Great Lakes Entomologist

The nests of social Hymenoptera are particularly attractive to species engaging in resource robbing due to their concentration of resources. Here, the identity of heterospecific intruders in Bombus impatiens nests are described, with a particular focus on intrusion by invasive species – Vespula germanica and Anthidium oblongatum. While V. germanica is well known as a resource robber, this is the first time Anthidium spp. have been documented entering the nest of a social heterospecific. Of 16 Bombus impatiens colonies placed in a field in Lansing, MI, eight had heterospecific intruders, including Apis mellifera, A. oblongatum, and V. …


Insect Visitors Of Cirsium Pitcheri, A Threatened And Endemic Dune Species, In Relation To Annual Weather Variation, Jordan M. Marshall Jan 2018

Insect Visitors Of Cirsium Pitcheri, A Threatened And Endemic Dune Species, In Relation To Annual Weather Variation, Jordan M. Marshall

The Great Lakes Entomologist

Cirsium pitcheri (Torr. ex Eaton) Torr. & A. Gray (Pitcher’s thistle) is a threatened herbaceous plant endemic to sand dune ecosystems along Lakes Huron, Michigan, and Superior in North America. Habitat for this plant is limited to active dunes with moving sand. I observed floral visitors of C. pitcheri in Indiana Dunes National Lakeshore and Indiana Dunes State Park, and calculated frequency and density of visitor families. Additionally, I tested for relationships between visitor counts and previous growing season mean temperature and precipitation. Formicidae, Anthomyiidae, and Cecidomyiidae were the most frequent families. However, Apidae was the only family correlated with …