title: Ancistrocerus capra (De Saussure, 1857), a Valid Species, Not a Synonym of A. antilope (Panzer, 1798) (Hymenoptera: Vespidae: Eumeninae)
abstract: Ancistrocerus capra was described by de Saussure in 1857 from North America and then was synonymized with the Palaearctic A. antilope (Panzer, 1798) by Bequaert in 1944. Although these species share a combination of two characters (impunctate and shining metapleuron and lateral surface of the propodeum and a bifurcate apex of the aedeagus) not known in other species of Ancistrocerus, they are clearly different in the structure of the clypeus (especially in the male) and the male genitalia (struc
journal: American Museum Novitates