Cross-transmission studies with Eimeria arizonensis, E. arizonensis-like oocysts and Eimeria langebarteli: host specificity at the genus and species level within the Muridae.

Cross-transmission experiments were done using sporulated oocysts of Eimeria arizonensis from Peromyscus truei and Peromyscus maniculatus, and oocysts of 2 putative species that resemble E. arizonensis, i.e.

Amoebogregarina Nigra n. gen., n. comb. (Apicomplexa: Gregarinidae) from adult Melanoplus differentialis (Orthoptera: Acrididae) in southeastern Nebraska.

Amoebogregarina nigra n. gen., nov.

Revision of the genus Xiphocephalus and description of Xiphocephalus ellisi n. sp. (Apicomplexa: Eugregarinida: Stylocephalidae) from Eleodes opacus (Coleoptera: Tenebrionidae) in the western Nebraska Sandhills.

Xiphocephalus is revised, clarifying diagnosis of the epimerite complex, gametocyst, and oocyst. Xiphocephalus ellisi n. sp.

Revision of the genus Torogregarina and description of Torogregarina sphinx n. sp. (Apicomplexa: Eugregarinida) from a Missouri river bank beetle, Bembidion laevigatum (Coleoptera: Carabidae), in southeastern Nebraska.

Torogregarina is revised to clarify the nature of the epimerite-protomerite complex and the method of gametocyst dehiscence, removed from the family Gregarinidae, and placed among the Hirmocystidae. Torogregarina sphinx n. sp.

Cuticular hydrocarbons ofAedes hendersoni cockerell andA. triseriatus (SAY).

Field-caught adult male and femaleAedes hendersoni are difficult to distinguish from the sibling speciesA. triseriatus. We found that mosquitoes from the same sex of the sibling species can not be readily separated either by unique cuticular hydrocarbon components or by differences in percent composition of those components.

Geographic variation of cuticular hydrocarbons among fourteen populations of Aedes albopictus (Diptera: Culicidae).

Cuticular hydrocarbons were used to differentiate among fourteen Aedes albopictus (Skuse) populations from Asia, Brazil, and the United States. Forty cuticular hydrocarbon peaks from each North American population were previously identified using gas chromatography electron impact-mass spectrometry. The same cuticular hydrocarbon peaks were identified in the Asian and Brazilian populations.

Tree hole Culicoides (Diptera: Ceratopogonidae) of the Central Plains in the United States.

Three-hundred eleven tree holes were sampled for Culicoides at 27 localities in Colorado, Kansas, Nebraska, Oklahoma and South Dakota. Of the 311 samples taken, 170 produced specimens, and 2,899 Culicoides were collected including 12 species. The 5 most common species (number collected) were C.

Cuticular hydrocarbon geographic variation among seven North American populations of Aedes albopictus (Diptera: Culicidae).

Cuticular hydrocarbons were used to differentiate among the following North American populations of Aedes albopictus: Chicago, Ill.; Milford, Del.; Jacksonville, Fla.

Human skin temperature and mosquito (Diptera: Culicidae) blood feeding rate.

The relationship between skin temperature and mosquito blood feeding behavior was examined in nine human subjects. A system implementing computer control of skin temperature was utilized during blood feeding sessions in which feeding behavior (preforaging, foraging, probing, feeding) was timed and compared at five successive skin temperatures (29.0 degrees C-36.

Habitat and temporal partitioning of tree hole Culicoides (Diptera: Ceratopogonidae).

Spring emergence patterns of tree hole Culicoides were examined at 11 geographic locations. Habitat selection was one mechanism of partitioning used by Culicoides. One group (3 species) occupied tree holes with standing water (wet), while the other (7 species) inhabited tree holes without standing water (dry).

Habitat pH characteristics of tree hole Culicoides (Diptera: Ceratopogonidae).

Ten species of Culicoides were collected from 166 tree holes at 20 widely separated geographic locations to assess relationships with habitat pH. Wet tree holes (containing standing water) had a mean pH of 7.46 while dry tree holes (no standing water) had a mean pH of 8.

Culicoides (Diptera: Ceratopogonidae) species in southeastern Nebraska.

Twenty-four species of Culicoides were collected between April and September of 1986 from Nemaha and Richardson counties of southeastern Nebraska using New Jersey light traps and tree hole sampling. Light trap samples were dominated by C. crepuscularis (42.