Entomology Commons^™

Natural Enemies Of Alfalfa Weevil, Hypera Postica (Coleoptera: Curculionidae), In Minnesota, Kathy L. Flanders, Edward B. Radcliffe, Craig A. Krueger

The Great Lakes Entomologist

Alfalfa weevil, Hypera postica, is present throughout Minnesota. How- ever, economically damaging populations seldom occur, due to a combination of natural enemies and adverse climatic conditions. Five natural enemies of alfalfa weevil were found in Minnesota. Microctonus aethiopoides (Hymenoptera: Braconidae), a parasitoid of adults, was recovered from 43 of 65 counties surveyed during 1984 and 1985. Tetrastichus incertus (Hymenoptera: Eulophidae) and Bathyplectes curculionis (Hymenoptera: Ichneumonidae), para­sitoids of larvae, were each recovered from 13 of 15 counties surveyed during 1991-1993. Bathyplectes anurus, another parasitoid of larvae, was recovered from one county In 1991, four counties in 1992, and six …

Agonopterix Alstroemeriana (Oecophoridae) And Other Lepidopteran Associates Of Poison Hemlock (Conium Maculatum) In East Central Illinois, May R. Berenbaum, Terry L. Harrison

The Great Lakes Entomologist

Poison hemlock (Conium maculatum) (Apiaceae), a noxious Eurasian weed extensively naturalized throughout North America, is characteristically attacked by few insects. Over the past two decades, an introduced oecophorid caterpillar, Agonopterix alstroemeriana, has been reported infesting poison hemlock, its sole host in its area of indigeneity, in parts of the northeastern and western United States. We report for the first time evidence of established midwestern populations of this species. We also report poison hemlock as a host plant for the polyphagous lepidopterans Eupithecia miserulata, Trichoplusia ni, and Spilosoma virginica.

Field Recognition Of Adult Acentrella And Heterocloeon (Ephemeroptera: Baetidae), R. D. Waltz

The Great Lakes Entomologist

The highly developed anterior process of the mesothorax, is described as a useful field character for identifying adults of Acentrella and Heterocloeon in the Nearctic. This presumed adult synapomorphy suggests a sister relation- ship of the two genera.

Significant Range Extension Of Leptotes Marina (Lepidoptera: Lycaenidae) Into New York State, Wayne K. Gall, Robert F. Andrle

The Great Lakes Entomologist

(excerpt)

The Marine Blue, Leptotes marina (Reakirt) (Lepidoptera: Lycaenidae), is resident from the southwestern United States south through Mexico to Guatemala, with strays reported no further northeast than extreme northwestern Indiana and extreme south-central Ohio (Opler and Krizek 1984, Scott 1986, Shull 1987, Opler and Maliku 11992, Parshall 1993). Although L. marina may be easily overlooked in the field (Iftner, Shuey and Calhoun 1992), the paucity of published records, e.g., two in Illinois (Irwin and Downey 1973), one in Indiana (Shull 1987), and one in Ohio (Parshall 1993), may truly reflect the rarity of strays in the northeastern portion of …

The Development Of A Sex Pheromone Lure For The American Plum Borer, Euzophera Semifuneralis (Lepidoptera: Pyralidae), A Major Pest Of Cherry In Michigan., D. J. Biddinger, W. Roelofs, A. J. Howitt

The Great Lakes Entomologist

Pheromone components of the American plum borer, Euzophera semifuneralis, were defined by use of the electroantennogram screening technique and capillary gas chromatographic retention times of sex pheromone gland constituents. Field studies showed that greatest attraction was achieved with a 1 mg load rate of a 4-component blend in a rubber septum. This blend consisted of a 2:1 ratio of Z,E-9,12-14:ALD and Z9-14:ALD and an equal amount of the corresponding alcohols in a 2:1 ratio, respectively. Commercial lures were used to compare the flight patterns of the American plum borer, peachtree borer (Synanthedon exitiosa), and lesser peachtree borer (Synanthedon …

Checklist Of The Ants Of Michigan (Hymenoptera: Formicidae), George C. Wheeler, Jeanette N. Wheeler, Paul B. Kannowski

The Great Lakes Entomologist

A total of 113 species of ants is recorded by county from the state of Michigan. The list is based upon literature records and specimens in the authors' collections and those of the University of Michigan Museum of Zoology and the Michigan State University Department of Entomology. The list includes 3 species in Ponerinae, 44 in Myrnucinae, 6 in Dolichoderinae, and 60 in Formicinae. Ten species represent new state records. Five distribution pat- terns are evident: statewide (39 species), southern counties only (5), southern 3/4th of Lower Peninsula (10), Lower Peninsula (17), and Upper Peninsula (2). Forty species have been …

Dytiscidae And Noteridae Of Wisconsin (Coleoptera). V. Distribution, Habitat, Life Cycle, And Identification Of Species Of Hydroporinae, Except Hydroporus Clairville Sensu Lato, William L. Hilsenhoff

The Great Lakes Entomologist

Thirty species in 11 genera of Hydroporinae were collected in Wisconsin over the past 32 years, excluding those in Hydorporus s.l. Fourteen species of Hygrotus were found; other genera were represented by one to four species. Species keys and notes on identification are provided for adults of all species that occur or may occur in Wisconsin. Information on distribution and abundance in Wisconsin, habitat, and life cycle is provided for each species based on a study of 34,628 adults. Life cycles were predominantly univoltine, with adults overwintering and larvae completing development from late spring to late summer, depending on the …

Comparative Study Of Life Histories, Laboratory Rearing, And Immature Stages Of Euschistus Servus And Euschistus Variolarius (Hemiptera: Pentatomidae), Joseph Munyaneza, J. E. Mcpherson

The Great Lakes Entomologist

A comparative study was conducted of the field life histories of Euschistus servus and E. varialarius in southern Illinois, their life cycles under controlled laboratory conditions, and their immature stages.

The results indicate that E. servus is bivoltine and E. variolarius is univoltine. Adults of both species emerged from overwintering sites during early April, began feeding and copulating on leaves of common mullein (Verbascum thapsus) and surrounding vegetation, and reproduced shortly thereafter. Neither eggs and first instars of either species, nor second instars of E. variolarius, were collected in the field. Seasonal occurrences of the adults and subsequent immature stages …

Between-Site Variation In Suitability Of Salix Cordata As A Host For Altica Subplicata (Coleoptera: Chrysomelidae), Dennis J. Milanowski, Catherine E. Bach

The Great Lakes Entomologist

To investigate local adaptation of insect herbivore populations to host plant populations, willow flea beetles (Altica subplicata) were collected from two distant sites in northern Michigan (Grass Bay, GB; Pte. Aux Chenes, PAC) and reared on host plants (Salix cordata) collected from each of the sites. Larval development (measured by molt frequency and length of larval stage) was significantly faster on PAC plants than on GB plants but did not differ for the two beetle populations. For both populations of beetles, mean pupal weight was also greater on PAC plants than on GB plants. Thus, there was no evidence for …

Revision Of The Species Of Lytopylus From Area De Conservación Guanacaste, Northwestern Costa Rica (Hymenoptera, Braconidae, Agathidinae), Ilgoo Kang, Eric G. Chapman, Daniel H. Janzen, Winnie Hallwachs, Tanya Dapkey, M. Alex Smith, Michael J. Sharkey

Entomology Faculty Publications

Thirty two new species of Lytopylus (Agathidinae) are described with image plates for each species: Lytopylus alejandromasisi sp. n., Lytopylus alfredomainieri sp. n., Lytopylusanamariamongeae sp. n., Lytopylus angelagonzalezae sp. n., Lytopylus cesarmorai sp. n., Lytopylus eddysanchezi sp. n., Lytopylus eliethcantillanoae sp. n., Lytopylus ericchapmani sp. n., Lytopylus gahyunae sp. n., Lytopylus gisukae sp. n., Lytopylus guillermopereirai sp. n., Lytopylusgustavoindunii sp. n., Lytopylus hartmanguidoi sp. n., Lytopylus hernanbravoi sp. n., Lytopylushokwoni sp. n., Lytopylus ivanniasandovalae sp. n., Lytopylus johanvalerioi sp. n., Lytopylusjosecortesi sp. n. …

A Record Of Nomada (Nomada) Colorata From Illinois With A Suggested Host Species (Hymenoptera: Apoidea), John K. Bouseman

The Great Lakes Entomologist

(excerpt)

Nomada colorata (Anthophoridae)was described by Mitchell (1962) on the basis of the holotype female from Michigan and two female paratypes from Michigan and New York.

New Distribution Records For Ophiogomphus Howei (Odonata: Gomphidae), K. J. Tennessen

The Great Lakes Entomologist

New distribution records establish Ophiogomphus howei as a resident species in Wisconsin. Kentucky, Maine, and Minnesota are added as new state records for this seldom-encountered gomphid dragonfly. Larval habitats appear to be undisturbed rivers 10-200 m wide, with sand and gravel sub-strates.

New Records Of Leaf-Feeding For Adult Diabrotica Barberi (Coleoptera: Chrysomelidae), Louis S. Hesler

The Great Lakes Entomologist

The first records of leaf-feeding on Iva xanthifolia (marsh elder) and Helianthus annuus (common sunflower) by adult Diabrotica barberi are reyorted. During September 1992, beetles were observed feeding on leaves 0 these plants, despite the availability of alternate flowering hosts. Beetles confined to clip cages in the laboratory fed readily on leaves of I. xanthifolia and H. annuus but not on those of Solidago missouriensis (goldenrod).

Drosophilidae (Diptera) Collected In Spring In Michigan, Henretta Trent Band

The Great Lakes Entomologist

Drosophilids in mid-Michigan overwinter in a preadult stage. One hun- dred twenty-two individuals (84 f, 38 m) representing 14 species were collected over bait in April and May 1992. All appeared recently emerged and had entire wings. This agrees with earlier reports in Michigan and Massachusetts that Drosophila affinis group species overwinter as preadults. Among the species overwintering as preadults in Michigan, Drosophila affinis, D. algonquin, D. athabasca, D. robusta, D. falleni and D. recens have been found to overwinter as adults in New York Latitude and climate may play a role in drosophilid overwintering stage.

Distinguishing Nymphal Instars Of Mesovelia Mulsanti (Heteroptera: Mesoveliidae), J. E. Mcpherson, Steven J. Taylor

The Great Lakes Entomologist

The five nymphal instars of Mesouelia mulsanti can be separated by the number of rows of setae on the second abdominal tergum. Fifth instars can be separated from younger instars and from each other by the degree of development of the external genitalia.

Movement Of Adult Colorado Potato Beetles, Leptinotarsa Decemlineata (Coleoptera: Chrysomelidae), In Response To Isolated Potato Plots, Michael A. Caprio, Edward J. Grafius

The Great Lakes Entomologist

Mark recapture techniques were used to determine Colorado potato beetle movement in circular arenas with isolated plots of potatoes at each ordinal direction. Post-diapause beetles aggregated on one or a few of the plants in one of the plots for each release, but not on the same plants in different releases. Differences in plant attractiveness were therefore not likely responsible for the aggregatory behavior. Aggregations were probably a result of either coordinated movement from the release site to the plants or an aggregatory signal with a range of at least 15 m. Summer adults did not aggregate on plants. Correlations …

Interaction Between Visual And Phonotactic Orientation During Flight In Magicicada Cassini (Homoptera: Cicadidae), Thomas E. Moore, Franz Huber, Theo Weber, Ulla Klein, Cornelia Back

The Great Lakes Entomologist

Visual and phonotactic orientation often occur simultaneously in diurnal cicadas. and these animals generally have their largest sensory elaboration in eyes and hearing organs. Phonotactic orientation occurs principally during flight. Males and females of Magicicada cassini commonly perform low- altitude « 5 m) and short-distance « 15 m) flights in their natural habitat at flight speeds of 3 to 6 m/s. During flight, the long body axis is tilted 10° to Q , head upward. Wing beat frequencies of tethered animals at 24° to 26°C averaged 28.8 Hz. Body temperature in the field for flying individuals aver- aged 4.6°C above …

Dytiscidae And Noteridae Of Wisconsin (Coleoptera). Iv. Distribution, Habitat, Life Cycle, And Identification Of Species Of Agabini (Colymbetinae), William L. Hilsenhoff

The Great Lakes Entomologist

Adults of 24 species of Agabus and 10 species of Ilybius were collected in Wisconsin over the last 32 years. Keys and notes on identification are pro­vided to facilitate identification of adults of these species and six others that may occur in Wisconsin. Agabus larvae were separated from those ofIlybius by the more posterior position of the dorsal seta of the basal setal whorl on the urogomphus, the number and location of srines on the metatarsi, and the presence of long setae on the last abdomina segment of most species. Information on distribution and abundance in Wisconsin, habitat. and …

The Distribution Of Three Broadly Sympatric Species Of Symmerista Moths (Lepidoptera: Notodontidae) In The Great Lakes And Midwest Regions Of The United States., Julian P. Donahue

The Great Lakes Entomologist

All three superficially inseparable species of Symmerista known to occur in eastern North America are sympatric in, and reach their western limit of distribution in, the southern Great Lakes and Midwest Regions of the United States. In this region two of the species also reach their southern limit of distribution (S. canicosta reaches its southwestern limit in North Dakota, South Dakota, Missouri, Kentucky, and North Carolina; S. leucitys reaches its southwestern limit in North Dakota, Missouri and Kentucky). The third species (S. albifrons) reaches its northwestern limit in Michigan and Wisconsin. All three species are here documented …

Use Of Ethanol-And-Turpentine-Baited Flight Traps To Monitor Pissodes Weevils (Coleoptera: Curculionidae) In Christmas Tree Plantations, L. K. Rieske, K. F. Raffa

The Great Lakes Entomologist

Pissodes nemorensis and Pissodes strobi are major pests of pine production in eastern North America. Ethanol-and-turpentine baited traps were used here to monitor weevil populations in a Scotch pine Christmas tree plantation in Wisconsin. Baited pitfall traps were ineffective in trapping either weevil species. However, baited flight traps at 0.8 and 1.6 m above ground effectively captured flying weevils of both species, 70% of which were P. nemoren­sis. Females of both species were more attracted than males to the ethanoll turpentine baits. Significantly more female P. nemorensis and total P. nemorensis were trapped at a height of 0.8 m …