Supplementary Studies on the Systematics of the Genus Perdita (Hymenoptera, Andrenidae)

Discrimination of Genera of Euplectini of North and Central America (Coleoptera: Pselaphidae)
By Philip Hunter Timberlake, Albert A. Grigarick, Robert O. Schuster
Discrimination of Genera of Euplectini of North and Central America (Coleoptera: Pselaphidae)
Taxonomic Studies of the Encyrtidae with the Descriptions of New Species and a New Genus (Hymenoptera, Chalcicoidea)
By Ronald J. McGinley
Taxonomic Studies of the Encyrtidae with the Descriptions of New Species and a New Genus (Hymenoptera, Chalcicoidea)
Review of the Nearctic Alysiini (Hymenoptera, Braconidae): With a Discussion of Generic Relationships Within the Tribe
By Robert Wharton
Review of the Nearctic Alysiini (Hymenoptera, Braconidae): With a Discussion of Generic Relationships Within the Tribe
Nesting Biology and Associates of Melitoma (Hymenoptera, Anthophoridae)
By Earle Gorton Linsley, Charles Duncan Michener, John Winslow MacSwain
Nesting Biology and Associates of Melitoma (Hymenoptera, Anthophoridae)
Paperbound Books in Print

Paperbound Books in Print
Pure and Applied Science Books, 1876-1982

Over 220,000 entries representing some 56,000 Library of Congress subject headings. Covers all disciplines of science and technology, e.g., engineering, agriculture, and domestic arts. Also contains at least 5000 titles...