ATS have always been associated in legend with witchcraft and 
sorcery, and an instinctive antipathy to them or even a fear of 
them has been strongly engendered in the human race. As a matter 
of fact, however, the native species of bats are among the most 
harmless of mammals. 
Complaints against bats are limited almost exclusively to their 
habit of roosting in homes and other occupied buildings. Their 
roosts can usually be eliminated without harm to the bats, either by 
driving them away with an obnoxious gas or by bat proofing the 
buildings. This publication describes practical ways of accomplishing 
this. : 
Washington, D.C. Issued September 1935 
II 
