BioStor
 | Synopsis of the Silphidae of the United States, with reference to the genera of other countries (1880) Transactions of The American Entomological Society 8: 219-321 |
 | A list of Coleoptera from the southern shore of Lake Superior, with remarks on geographical distribution Wickham Henry Frederick (1897) Proceedings of the Davenport Academy of Natural Sciences 6: 125-169 |
 | A List of Insects Taken in the Adirondack Mountains, New York. - I. A Macgillivray (1902) Entomological News, Philadelphia 13(8): 247-253 |