U. S. DEPARTMENT OF AGRICULTURE 
BUREAU OF BIOLOGICAL SURVEY 
Form Bi-689 
FIELD D1ARV 
NOTICE 
This book is Government property. The finder 
is requested to mail it to the Bureau of Bio¬ 
logical Survey, Department or Agriculture, 
Washington, D. 0., or deliver it to the official 
whose name appears above. A detachable addressed 
frank will be found on the last page; by tying this 
on the cover the book may be mailed without post¬ 
age or wrapping if fastened shut. 
GOVERNMENT PRINT IN 0 Ol'ETCK 
8—4925 
