29 
This species departs so remarkably from others of the group that it 
seems necessary to create for it a new genus. The most important 
characters and those which seem of generic value are the three-jointed 
antenne and the semicircular plates on margins of the abdomen. The 
sternal structure is also different. In general aspect, however, it ap- 
proaches the genus Heematopinus. 
Two specimens, both females, collected from the pocket or pouched 
gopher, Geomys bursarius, at Ames, Iowa. 
