BioStor
 | XX.—Some bees of the genus Megachile from New Mexico and Colorado T D A Cockerell (1898) Annals And Magazine of Natural History 1: 125-130 |
 | II.—The New Mexico bees of the genus Megachile and a new Andrena T D A Cockerell (1900) Annals And Magazine of Natural History 6: 7-20 |
 | Notes on some bees in the British Museum T D A Cockerell (1905) Transactions of the American Entomological Society 31: 309-364 |
 | Additional results of collecting insects in Kansas and Colorado E S Tucker (1909) Transactions of the Kansas Academy of Sciences 22: 276-304 |
 | Bees in the collection of the United States National Museum T D.a. Cockerell (1919) Proceedings of the United States National Museum 55: 167-221 |