Hebard M. 1939. Studies in Orthoptera which occur in North America north of the Mexican boundary. X. New and critical notes on previously known Tettigoniidae. Trans. Am. Entomol. Soc. 65: 161-183, 3 pl.
Hebard M. 1941. The group Pterophyllae as found in the United States (Tettigoniidae:Pseudophyllinae). Trans. Am. Entomol. Soc. 67: 197-219, 2 pl.
Strohecker HF. 1939. Distributional and taxonomic notes on southeastern Dermaptera and Orthoptera and a new species of Cycloptilum (Gryllidae). Can. Entomol. 71: 169-175.