IOWA ACADEMY OF SCIENCP:S. 131 



Ha:matopinus antennatufs Osborn. Collected from fox squirrel. 



Hirmatopinus scmropteri Osbora. A very iuteresting species occurring on 

 the Hying squirrel Sciuropterus volucella. 



Hiiniialopinus hes2)eromi/rHs OsboYu. Occurs on the white-footed or deer 

 mouse Hesperomys lencojms at Ames. 



Hicmalopinus spinulosus Burm. On the x'at, but not found in any great 

 numbers; it is a very ?mall species. 



Eivmatopinus acanlhopus Bux'm. Apparently common on our species of 

 Arvicola. 



Hoimatopiyioides squamosics Osbora. Taken in very small numbers from 

 the pocket gopher Geomys bursarius. 



