Abstract
R. cascadilla Wigdor is redescr. from Semotilus a. atromaculatus and Hyborhynchus notatus in Illinois. New spp. are R. decaturensis from Aplodinotus grunniens in Ill., R. cotti, from Cottus cognatus, and R. pellucida, from Pteichocheilus oregonensis, Washington. The taxonomic significance of the left spicule is suggested.
Keywords

This publication has 1 reference indexed in Scilit: