casadae Cockerell, new comb.

Megachile Casadae Cockerell 1898a: 127 ­129. Male. Type locality: Las Cruces, New Mexico [U.S.A.].

Megachile (Xeromegachile) casadae Mitchell 1937a: 348 ­350.

Megachile populi Cockerell 1900: 17 ­18. Female. Type locality: Mesilla Park, New Mexico Agricultural College [U.S.A.]. Synonymy of Mitchell 1937a: 348.

Megachile opuntiarum Cockerell 1906a: 229 ­230. Female. Type locality: Boulder, Colorado [U.S.A.]. Synonymy of Cockerell 1908b: 265.

Megachile austinensis Mitchell 1927b: 105 ­106. Female. Type locality: Austin, Texas [U.S.A.]. Synonymy of Mitchell 1937a: 348.