American Permian vertebrates
Fam. Syrphidae
Fieldiana: Geology, Volume 2
Manual of North American Diptera
On the Diptera of St. Vincent (West Indies)
On the osteology of Nyctosaurus (Nyctodactylus), with notes on American pterosaurs
Synopsis of the families and genera of North American Diptera: exclusive of .
Synopsis of the families and genera of North American Diptera, exclusive of the genera of the Nematocera and Muscidae, with bibliography and new species, 1878-88