Cockerell 1927a : 20 New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae) Raw, Anthony Zootaxa 2002 71 1 43 3YRVQ Cockerell Cockerell [264,560,1318,1344] Insecta Megachilidae Megachile Animalia Hymenoptera 31 32 Arthropoda species leucostomella comb. nov.     Megachile leucostomella  Cockerell 1927a: 20. Male. Typelocality: Huachi, Beni, Bolivia. Typerepository: USNM 29089. Examined.