Conocephalus hygrophilus, drawing of male. Plate XV, Fig. 9 in Rehn, J.A.G. and M. Hebard. 1915. Studies in American Tettigoniidae. V. A synopsis of the species of the genus Conocephalus (Xiphidium of authors) found in North America north of Mexico. Trans. Am. Entomol. Soc. 41: 155-224.
