Improved key to New World species of Sphecius (Hymenoptera: Crabronidae)

TitleImproved key to New World species of Sphecius (Hymenoptera: Crabronidae)
Publication TypeJournal Article
Year of Publication2006
AuthorsHolliday, C. W., & Coelho J. R.
JournalAnnals of the Entomological Society of America
Volume99
Pagination793-798