Mitchell 1938 : 174 New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae) Raw, Anthony Zootaxa 2002 71 1 43 3YR8N Mitchell Mitchell [264,483,1203,1230] Insecta Megachilidae Megachile Animalia Hymenoptera 15 16 Arthropoda species astragali comb. nov.     Megachile (Derotropis) astragali  Mitchell 1938: 174. Male. Typelocality: Mojave Desert, California, U.S.A.