U.S. DEPARTMENT OF AGRICULTURE. 
division of entomology. 
Bulletin No. 7. 
THE 
PEDICULI AXD MALLOPHAGA 
AFFECTING > 
MAX AXD THE LOWER ANIMALS. 
BY 
PROF. HERBERT OSBORN. 
(PUBLISHED BY THE AUTHORITY OF THE SECRETARY OF AGRICULTURE.) 
WASH I XGTON: 
GOVERNMENT PRINTING OFFIC 
1891. 
