BioStor
 | Papers from the Harriman Alaska expedition. 9. Entomological results (3): Diptera D W Coquillett (1900) Proceedings of the Washington Academy of Sciences 2: 389-464 |
 | An annotated list of the Diptera (Flies) of Oregon F R Cole and A L Lovett (1921) Proceedings of the California Acadademy of Sciences 11: 197-344 |