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New Nebraska Occurrences Of The Endangered American Burying Beetle (Coleoptera: Silphidae), Brett C. Ratcliffe, Mary Liz Jameson

University of Nebraska State Museum: Entomology Papers

Six new records for the endangered American burying beetle, Nicrophorus americanus Olivier, are reported from the Nebraska Sandhills. Nebraska is one of only four states in the United States where this beetle remains extant.

Nebline, January 1992

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Department Of Entomology Newsletter - No. 6, 1992

Hexapod Herald and Other Entomology Department Newsletters

This Sixth Newsletter of the Department of Entomology University of Nebraska is Sincerely Dedicated to the memories of: Robert E. Roselle and Jerold H. L. Bell

Extension News, Fred Baxendale

Teaching News, J. Ackland Jones

Research News, Z. B. Mayo

Museum News, Brett C. Ratcliffe

South Central Research and Extension Center News, Robert J. Wright

West Central Research and Extension News, John B. Campbell

Northeast Research and Extension News, John F. Witkowski

Panhandle Research and Extension News, Gary l. Hein

Lawrence Bruner Entomology Club

Linnaean Games Team News, Robert Wright, Coach

Recent Retirements

FACULTY / Baxendale, Fred P., Associate Professor …

First Report Of The Chinch Bug (Heteroptera: Lygaeidae) Egg Parasitoid Eumicrosoma Beneficum Gahan (Hymenoptera: Scelionidae) In Nebraska, Robert Wright, Stephen D. Danielson

Department of Entomology: Faculty Publications

A scelionid wasp, Eumicrosoma beneficum Gahan, was reared from chinch bug, Blissus leucopterus leucopterus (Say), eggs collected from wheat (Triticum aestivum L.) near Odell, Nebraska, in June 1989. Three-hundred twenty-one of 680 chinch bug eggs (47.2%) were parasitized by E. beneficum. Based on a subsample of 92 wasps the population was 64.1% female. This is the first report of this wasp from Nebraska.

Field Worker Exposure To Selected Insecticides Applied To Com Via Center-Pivot Irrigation, Shripat T. Kamble, Matthew E. Byers, John F. Witkowski, Clyde L. Ogg, Gerald W. Echtenkamp

Department of Entomology: Faculty Publications

Field workerswere monitored for dermal and respiratory exposure to chlorpyrifos (with and without crop oil), carbaryl, and permethrin at reentry intervals of 2, 4, 8, 24, and 48 h after application. Insecticides were applied to R3 stage corn through an overhead center-pivot irrigation system. Dermal exposure was measured by analyzing 18 gauze pads attached to the clothing of workers to represent human body regions. Hand exposure was determined using cotton gloves. Respiratory exposure was determined using portable air samplers equipped with polyurethane foam plugs to trap ambient insecticide residues. Gas liquid chromatography was used to quantify residues of chlorpyrifos and …

Proposed System Of Nomenclature For Biotypes Of Hessian Fly (Diptera: Cecidomyiidae) In North America, F. L. Patterson, John E. Foster, H. W. Ohm, J. H. Hatchett, P. L. Taylor

Department of Entomology: Faculty Publications

Twenty genes in wheat, Triticum spp., for resistance to Hessian fly, Mayetiola destructor (Say),have been previously designated H1 to H20. The location on wheat chromosomes of some of the genes is known, but several have not yet been assigned to specific chromosomes. Four wheat differential cultivars have been used to identify 16 possible biotypes of Hessian fly; biotypes were designated GP and A-O. If an additional differential host genotype were added, it is apparent that there are not enough letters in the alphabet to designate all of the biotypes. Therefore, a new system of biotype designation is proposed. Three …

Mitochondrial Transfer Rna Genes In A Black Fly, Simulium Vittatum (Diptera: Simuliidae), Indicate Long Divergence From Mosquito (Diptera: Culicidae) And Fruit Fly (Diptera: Drosophilidae), K. P. Pruess, X. Zhu, T. O. Powers

Department of Entomology: Faculty Publications

Sequences are given for nine complete genes and one partial mitochondrial tRNA gene of the black fly, Simulium vittatum (Zetterstedt). Sequenced tRNA genes were for alanine, arginine, asparagine, aspartic acid, glutamic acid, glycine, leucine(CUN), lysine, serine(AGN), and valine. Nucleotides were aligned with the same previously sequenced genes in Aedes albopictus Skuse and Drosophila yakuba Burla. A cluster of six tRNA genes, which differ in arrangement in Ae. albopictus and D. yakuba, was amplified by PCR and found to have the same position and orientation in S. vittatum as in D. yakuba. Overall, similarity with either D. yakuba or …

Sensitivity To 2,4-D In Sunflower As An Indicator Of Tolerance To The Sunflower Midge (Diptera: Cecidomyiidae), Marc D. Anderson, Gary J. Brewer

Department of Entomology: Faculty Publications

Nine sunflower hybrids were evaluated for their sensitivity to 2,4-dichlorophenoxyacetic acid (2,4-D) as measured by the production of ethylene. Sensitivity to 2,4-D was then compared with the degree of field tolerance to the sunflower midge, Contarinia schulzi Gagné, exhibited by each hybrid. For the hybrids evaluated, ethylene production increased with 2,4-D concentration and sensitivity to 2,4-D was inversely proportional to midge tolerance. The procedure may be useful in identifying midge tolerant germplasm.

Comparison Of Chemigated And Aerially-Applied Chlorpyrifos And Fenvalerate For Control Of European Corn Borer (Lepidoptera: Pyralidae) Larvae, Thomas J. Weissling, Frank B. Peairs, Stan D. Pilcher

Department of Entomology: Faculty Publications

Aerial and overhead center-pivot irrigation system (chemigated) applications of chlorpyrifos 4 emulsifiable concentrate (EC) and fenvalerate 2.4EC significantly reduced numbers of first- and second-generation European corn borer, Ostrinia nubilalis Hubner, larvae in field corn, Zea mays L. The number of first-generation O. nubilalis larvae, pupae, or cavities per plant in plots chemigated with chlorpyrifos in 1984 was significantly less than in plots where chlorpyrifos was applied aerially. A similar trend was observed for fenvalerate in 1985. No significant differences among application methods were observed for second-generation O. nubilalis treatments. Chlorpyrifos and fenvalerate were effective O. nubilalis control agents but efficacy …

Insect, Mite, And Nematode Pests Of Oat, Jaime E. Araya, John E. Foster

Department of Entomology: Faculty Publications

Various arthropods and nematodes cause damage to oat (Avena sativa L. and A. byzantina K. Koch.) plants throughout their life. No stage is free from damage. Crops can be affected from the seedling stage until the grain is harvested. Pests of oat are either polyphagous (damaging a wide range of plants) or oligophagous (feeding on only a few plant species). Few, if any pests, are truly specific to oat crops.

The presence of various pest species in oat fields does not necessarily imply that yield reduction will result. Hundreds of arthropod species feed on oat cultivated in the USA …

Nebline, December 1991

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Stings Of Ants Of The Tribe Ectatommini (Formicidae: Ponerinae), Charles Kugler

Insecta Mundi

The sting apparatus anatomy is described and compared for 24 species in six of the 9 extant genera of Ectatommini: Paraponera, Acanthoponera, Gnamptogenys, Ectatomma, Proceratium, and Discothyrea. Phylogenetic analysis sorts 15 species of Gnamptogenys into four species groups. Phylogenetic analyses on the six ectatommine genera suggest that: 1) Gnamptogenys and Ectatomma are sister genera, 2) Proceratium and Discothyrea are sister genera, 3) Acanthoponera may be more related to Gnamptogenys and Ectatomma than to the others, and 4) Paraponera may not belong with the other five genera.

Hexapod Herald - Vol. 2, No. 14, November 27, 1991

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Nebline, November 1991

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Hexapod Herald - Vol. 2, No. 13, October 23, 1991

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Nebline, October 1991

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Hexapod Herald - Vol. 2, No. 12, September 17, 1991

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Hexapod Herald - Vol. 2, No. 11, September 6, 1991

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Nebline, September 1991

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Acreage Resource Guide

Una Nueva Especie De Ferrisia Fullaway En La República Argentina. (Homoptera: Pseudococcidae), Maria Cristina Granara De Willink

Insecta Mundi

Ferrisia multiformis sp.n. is described from Argentina, on Parthenium sp. A key is given to separate it from virgata and meridionalis also present in Argentina.

Notes On Ant Larvae 1989-1991, George C. Wheeler, Jeanette Wheeler

Insecta Mundi

In 1976 we published "Ant Larvae: Review and Synthesis," which we regarded as a summary of our life-time of research. During the following years so many new larvae were added to our collection and so much was published about ant larvae that we decided another general treatment was desirable; so in 1986 we published a "Ten-Year Supplement" to include additions and revisions to our Memoir. In 1987 and 1988 additional material warranted a supplement to the "l0-year Supplement" in 1989a. This article is the third supplement to the Memoir.

In the supplement, two genera are characterized, one generic characterization is …

Type Species Of New World Hispinae Genera (Coleoptera: Chrysomelidae), C. L. Staines

Insecta Mundi

Type species designations are reviewed and discussed far six New World Hispinae genera. Valid designations are: Oediopalpa cyanipennis (Fab.), Homalispa (Homalispa) batesii Baly, H. (Xanthispa) cimicoides (Guerin), Demotispa pallida Baly, Cephaloleia nigricornis (Fab.), and Coraliomela brunnea (Thunberg).

Philonthus Furvus Nordmann, 1837 And Its Allies In Mexico And Central America (Coleoptera: Staphylinidae), A. Smetana

Insecta Mundi

The Mexican and Central American species associated with Philonthus firvus Nordmann, 1837 are reviewed. Nine species are treated, two of them, P. oenotrus and P. melampus, both from Mexico, are described as new. Philonthus flohri Sharp, 1876 is removed from synonymy with P. furvus. All species are described and illustrated, and a key is added to aid in their identification. All available records from Mexico and Central America, and biological data for the species are provided. Lectotypes are designated for: P. flohri Sharp, 1876; P. sallaei Sharp, 1885; P. fissilis Sharp, 1885; P. nigerrimus Erichson, 1840.

The Genus Vaejovis In Sonora, Mexico (Scorpiones, Vaejovidae), W. David Sissom

Insecta Mundi

The genus Vaejovis C. L. Koch in the Mexican state of Sonora is reviewed, based on the examination of numerous specimens from United States collections. Four species are reported to occur there: Vaejovis spinigerus (Wood), V. confusus Stahnke, V. sonorae Williams, and V. decipiens Hoffmann. Distributional information for all four species is updated, and a key is provided to facilitate identification. The subspecies V. spinigerus sonorensis Hoffmann is synonymized with V. spinigerus. The record for V. gravicaudus Williams on Isla Tiburon (Williams 1980) is demonstrated to be a misidentification resulting from atypical variation in the closely related V. spinigerus …

The Genus Serradigitus In Sonora, Mexico, With Descriptions Of Four New Species (Scorpiones, Vaejovidae), W. David Sissom, Scott A. Stockwell

Insecta Mundi

Taxonomic characters of the recently resurrected scorpion genus Serradigitus Stahnke are discussed, leading to changes in the diagnosis and composition of the genus. Four species, S. baueri (Gertsch), S. bechteli (Williams), S. littoralis (Williams), and S. pacificus (Williams) are transferred into Serradigitus from the genus Vaejovis. The diversity of Serradigitus and distribution of its species in the Mexican state of Sonora are investigated. Serradigitus hearnei (Williams) and S. subtilimanus (Soleglad) are reported for the first time there, and four new species are described (two of which also occur in the United States): S. allredi from southern Arizona and central …

A Revision Of The World Amphibulus Kriechbaumer (Hymenoptera: Ichneumonidae, Phygadeuontinae), John C. Luhman

Insecta Mundi

Amphibulus Kriechbaumer (Hymenoptera: Ichneumonidae, Phygadeuontinae = Gelinae, Gelini) is revised world-wide. It is separated from its sister group genus Endasys Foerster by means of a key and a diagnosis. Keys are given to 3 speciesgroups and 25 species, including European gracilis Kriechbaumer and fennicus Sawoniewicz. Mexican satageus (Cresson) is redescribed, and 22 species are newly described: africanus, awanticeps, aurarius, aureolus, bicolor, borealis, carinarum, dentatus, duodentatus, eurystomatus, flavipes, latioris, nigripes, orientalis, pentatylus, pilosus, pseudopustulae, pustulae, pyrrhoborealis, rugosus, salicis, and tetratylus. Thirty figures illustrate diagnostic characters.

Cse Grants Report

Insecta Mundi

The Center for Systematic Entomology periodically awards research grants to its members for systematic studies in support of the Florida State Collection of Arthropods (FSCA).

Color Identification Of Economically Important Spodoptera Larvae In Honduras (Lepidoptera: Noctuidae), S. Passoa

Insecta Mundi

Spodoptera frugiperda (J. E. Smith), S. exigua (Hiibner), S. latifascia (Walker), S. ornithogalli (Guenb), S. dolichos (Fabricius), S. sunia (Guenee), and S. eridania (Cramer) are commonly associated with crops in Honduras. A key to these species with color illustrations of rare and typical forms is presented. Potential problems in identifying Spodoptera species are discussed.

The Genus Culicoides In Uruguay (Diptera: Ceratopogonidae), Gustavo R. Spinelli, Maria E. Martinez

Insecta Mundi

A new phytotelmic species, Culicoides charua, is described and illustrated from adult males and females and their pupal exuviae. New records are provided for Uruguay of C. biestroi, C. chacoensis, and C. impusilloides. A key is presented for the identification of the twelve species of Culicoides that occur in Uruguay.

Hexapod Herald - Vol. 2, No. 10, August 2, 1991

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