BioStor
 | Catalogue of the described Hymenoptera of Australia. Part II W W Froggatt (1892) Proceedings of the Linnean Society of New South Wales 7: 205-248 |
 | Notes on a collection of Hymenoptera from Greymouth, New Zealand, with descriptions of new species (1898) Memoirs And Proceedings of The Manchester Literary And Philosphical Society 42: 1-53 |
 | Classification of the bees, or the superfamily Apoidea (1899) Transactions of The American Entomological Society 26: 49-100 |
 | Notes on some bees in the British Museum T D A Cockerell (1905) Transactions of the American Entomological Society 31: 309-364 |
 | Catalogue of Australian bees H Hacker (1921) Memoirs of the Queensland Museum 7: 99-163 |
 | The type species of the genera and subgenera of bees Grace A Sandhouse (1943) Proceedings of the United States National Museum 92(3156): 519-619 |
 | Classification of American Colletinae (Hymenoptera, Apoidea) Charles D Michener (1989) University of Kansas Science Bulletin 53(11): 623-703 |