BioStor
 | New genera and species of North American Tipulidae with short palpi, with an attempt at a new classification of the tribe C R Osten Sacken (1860) Proceedings of the Academy of Natural Sciences of Philadelphia 1859: 197-256 |
 | The biology of the North American crane flies (Tipulidae Diptera). III. The genus Ula Haliday C P Alexander (1915) Journal of Entomology and Zoology 7: 1-8 |
 | Undescribed Tipulidae (Diptera) from Western North America Charles P Alexander (1920) Proceedings of the California Academy of Sciences 10: 35-46 |
 | Diptera of the superfamily Tipuloidea found in the District of Columbia C P Alexander and W L Mcatee (1920) Proceedings of the United States National Museum 58: 385-435 |
 | A list of the crane-flies taken in the vicinity of Hazleton, Pennsylvania (Diptera) W G Dietz (1921) Transactions of the American Entomological Society 47: 233-268 |