A revision of the genus Passaloecus (Hymenoptera: Sphecidae) in America North of Mexico Reference:VINCENT, David Lowell. A revision of the genus Passaloecus (Hymenoptera: Sphecidae) in America North of Mexico. Wasmann Journal of Biology, 1978.URL:https://digitalcollections.usfca.edu/digital/api/collection/p15129coll11/id/737/download
