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Bi-ssa 
APR. 20 
UNITED STATES DEPARTMENT OF AGRICULTURE 
BUREAU OF BIOLOQIOAL SURVEY 
WASHINGTON, D. C. 
ALLOTMENT, AND INCREASE OR DECREASE. 
Date: December 23 t 1920. 
Dr. Alex. Wetmore, 
Assistant Biologist, 
C/0 U. S. Consul General, 
Buenos Aires, Argentina. 
Dear Sir: 
By direction of the Chief, Bureau of Biological Survey, the sum of 
4800.00 has been added to the amount allotted for expenditures 
under the appropriation "General Expenses, Bureau of Biological Survey, 192 1," 
SYMBOL N0...21 {Bird Migrat ion) 
during this fiscal 
Show this number on each Account charged hereto. 
year, under Letter of Authorization No. 35 -B.L., dated July 1, 1920. 
This is for the purpose of covering travel and miscellaneous expenditure 
in South America. 
Liabilities may be incurred against this amount not to exceed.: 
2nd Quarter $800.00 
Any unincumbered balance may be carried forward into the succeeding 
quarter. 
You will be held responsible for compliance with the terms of your 
Letter of Authorization and for keeping within the amount of your allot¬ 
ment. IF YOUR TOTAL ALLOTMENT IS EXCEEDED WITHOUT PREVIOUSLY OBTAINED 
WRITTEN AUTHOHITY OF THE CHIEF OF THE BUREAU, THE EXCESS WILL NOT BE MET 
BY THE BUREAU, UNLESS (l) THERE IS MONEY AVAILABLE FROM THE PROPER APPRO¬ 
PRIATION AND (2) A SATISFACTORY EXPLANATION IS MADE FOR FAILURE TO SECURE 
IN ADVANCE THE NECESSARY INCREASE. 
Very truly yours;. 
Ii _ 
