Efferia jubata Williston, 1885
| Some insects from the summit of Pike's Peak, found on snow Caudell Andrew Nelson (1902) Proceedings of the Entomological Society of Washington 5: 74-82 | |
| Robberflies of the genus Erax J S Hine (1919) Ann. Ent. Soc. Am 12: 103-154 | |
| Catalogue of the types in the Snow Entomological museum. Part III (Diptera) G W Byers, F Blank et al. (1962) Kansas University Science Bulletin 43: 131-181 | |
| Efferia Coquillett in America North of Mexico (Diptera: Asilidae) J Wilcox (1966) Proceedings of the California Academy of Sciences 34: 85-234 |