brethesi Schrottky, new comb.

Megachile Brethesi Schrottky 1909: 220 . Female. Type locality: Assuncion, Paraguay. Based on my specimens determined by Padre Moure the species is tentatively placed in this subgenus.

Megachile atricostifera Strand 1910: 534 . Female. Type locality: Villa Mora, Paraguay. Synonymy of Schrottky 1913a: 194.