Two New Species of HorcomutillaCasal, 1962 (Hymenoptera: Mutillidae), Description of Hitherto Unknown Males, and an Illustrated Key to All Known Species in the Genus

Most holotype specimens of Horcomutillaand other non-type materials deposited in museums of the Americas and Europe were examined resulting in the recognition of 13 valid species in Horcomutillaoccurring from Panama to southern Argentina. Six species are known from both sexes, six only from females and one only from the male. The new species Horcomutilla bernaliCambra & Williams, sp. nov., female and male, and Horcomutilla igriegaCambra & Williams, sp. nov., male, are described. The previously unknown males of H. denticeps(Spinola Spinola, Famille Mutillaires Latr Mem Acad Sci Turin 13:62–63, 1853) and H. pialaCasal Casal, Physis 30:171–172, 1970, are recognized and described. Horcomutilla suisCasal Casal, Notas Mus La Plata, Zool 20:63–75, 1962 is recognized as a junior synonym of Horcomutilla denticeps(Spinola, Spinola, Famille Mutillaires Latr Mem Acad Sci Turin 13:62–63, 1853). Horcomutilla projectifrons(Cresson, Cresson, Trans Amer Ent Soc 28:1–82, 1902) is recognized as a junior synonym of Horcomutilla fronticornis(Burmeister, Burmeister, Abhandl Naturf Ges Halle 2:19–29, 1854). Horcomutilla tobaCasal, Casal, Notas Mus La Plata, Zool 20:63–75, 1962 is recognized as a junior synonym of H. glabriceps(André, André, Anales Mus Nac Buenos Aires 3:169–214, 1908). The genus Horcomutillais reported for the first time from Colombia, Peru, Bolivia, Uruguay, and Trinidad. An updated key for species of the genus is presented and diagnostic morphological characters to separate all species are illustrated.