A Revision of the Bees of the Genus Andrena of the Western Hemisphere
Irregularly published technical series. This volume consists of two issues: 37(1), entitled "Part XIV: Subgenus Onagrandrena" and 37(2), entitled "Part XV: Subgenus Hesperandrena" Volume 37(2) Abstract: This work reports on a study of 1,200 specimens segregated into 9 species, 4 of which are new to science. One name is relegated to synonymy. The relationships within the subgenus and with other subgenera of Andrena are briefly discussed.