Mitchell 1930 : 211 Mitchell 1943 : 664 New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae) Raw, Anthony Zootaxa 2002 71 1 43 3YSFN Mitchell Mitchell [264,457,283,310] Insecta Megachilidae Megachile Animalia Hymenoptera 25 26 Arthropoda species sterilis comb. nov.     Megachile sterilis  Mitchell 1930: 211. Female. Typelocality: Cordova, Argentina. Typerepository: MCZ 16211. Examined.    Megachile (Pseudocentron) sterilis  Mitchell 1943: 664.