New species of North American bees of the genus Dufourea (Hymenoptera, Halictidae) with descriptions of two previously undescribed females /

Cover title.

Homonymy in world species-group names of Criocerinae (Coleoptera, Chrysomelidae) /

"Issued March 1981"--T.p. verso.

A revision of the American species of Hibiscus section Bombicella (Malvaceae) /

Includes indexes.

A systematic analysis of the pine pitch midges, Cecidomyia spp. (Diptera: Cecidomyiidae) /

Issued Nov. 1978.

The North American species of Forcipomyia, subgenus Euprojoannisia (Diptera: ceratopogonidae) /

Issued Dec. 1978.

Systematics of the genus Mimosestes (Coleoptera: Bruchidae) /

Issued Dec. 1978.

Ecology of the green peach aphid as a vector of beet western yellows virus of sugarbeets /

Issued Aug. 1979.

The genus Protheca of the Americas (Coleoptera: Anobiidae) /

Issued Dec. 1979.

A taxonomic study of the New World genus Stichtoptychus fall (Coleoptera: Anobiidae) /

Issued Feb. 1980.

A geologic approach to artificial recharge site selection in the Fresno-Clovis area, California /

Issued Jan. 1980.

A host-parasite catalog of North American Tachinidae (Diptera) /

Issued June 1978.

Future challenges in renewable natural resources : proceedings of a national workshop, January 22-25, 1979, Rosslyn, Virginia.

Issued Sept. 1979.

A five-year national plan for renewable resources extension programs.

Issued June 1980.

Alternatives for strengthening range research : proceedings of a meeting held in San Diego, California, February 9, 1980, preceding the annual meeting of the Society for Range Management /

Issued Aug. 1980.

Review of literature related to engineering aspects of grain dust explosions /

Issued Aug. 1979.