Subgenus Chelostomoides Robertson

Chelostomoides Robertson 1901: 231. Type species: Megachile rugifrons Smith 1854 (= M. rufimanus Robertson 1891). Subsequent designation (Mitchell 1937: 412).

Oligotropus Robertson 1903: 168. Type species: Megachile campanulae Robertson 1903 . Synonymy of Mitchell 1937: 381.

Gnathodon Robertson 1903: 168 . Type species: Megachile georgicus Cresson 1878 . (Not Oken 1816, not Sowerby 1832, not Streubel 1842, not Jardine 1845).

Sarogaster Robertson 1918: 92. Proposed to replace Gnathodon Robertson. Synonymy of Mitchell 1937: 381.

Chalicodoma (Chelostomoidella) Snelling 1990:36 . Types species: Megachile spinotulata Mitchell 1934 .

Megachile (Chelostomoides) Mitchell 1934: 298, 306. Michener et al 1994: 149, Michener 2000: 553.

Chalicodoma (Chelostomoides) Michener 1962: 20 .