[Hopopleura edentula (Anoplura, Hoplopleuridae), a parasite of voles of the genus Clethrionomys].

The louse Hoplopleura edentula Fahrennolz occurs not only on the vole Clethrionomys glareolus Schreb. but also on the other members of the genus widely distributed in the USSR, C. rutilus Pall. and C. rufocanus Sund. The characters distinguishing H. edentula from the close species H. acanthopus (Burm.) described from Microtus arvalis Pall. are the differences in the shape of the dorsal lobe of the pleural plate of the third abdominal segment and in the size of the male copulative organ.