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

Most holotype specimens of Horcomutilla and other non-type materials deposited in museums of the Americas and Europe were examined resulting in the recognition of 13 valid species in Horcomutilla occurring 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 bernali Cambra & Williams, sp. nov., female and male, and Horcomutilla igriega Cambra & 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. piala Casal Casal, Physis 30:171–172, 1970, are recognized and described. Horcomutilla suis Casal 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 toba Casal, 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 Horcomutilla is 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.