BioStor
 | The entomology of the Mid-Alpine zone of Custer County Colorado Cockerell T.d.a. (1893) Transactions of the American Entomological Society 20: 305-370 |
 | A list of the rarer insects captured in the so-called Chicago area W Longley (1905) Entomological News, Philadelphia 16(4): 125-127 |