Reprint of the 1948 ed., printed by F. Voiland, Jr., State Printer, Topeka, Kans., which was issued as v. 32 of the University of Kansas science bulletin, with new introductory materials.
Includes The genus Trichocorixa by R. I. Sailer (p. 289-372) which was originally presented as a thesis, University of Kansas, 1942.