UNITED STATES DEPARTMENT OF AGRICULTURE 
BUREAU OF BIOLOGICAL SURVEY 
WASHINGTON, D, C. 
ADDRESS REPLY TO 
CHIEF, BUREAU OF BIOLOGICAL SURVEY, 
AND REFER TO 
August If;, 1920 
BI-S 
f 
South America. 
Dr. Alex Wetmore, 
C/o Consul General of the United States r of America 
Calle Lavalie S41, 
Buenos Aires, Argentina. 
Dear Dr. Wetmore 
1 have your letter of July 6, from Resistencia Chaco and 
am very glad to learn that you are making satisfactory progress 
in that country. We note your plan to go on into Paraguay when 
through with' the Chaco region and return south in the spring. 
This seems a good plan for climatic reasons and you will probably 
in this way meet the southward migration of North American birds 
a little sooner than would otherwise be the.case. 
0 
Your references to conditions and to birds seen are very 
interesting indeed, and I shall be glad to have you write me as 
fully as possible as the work goes along. Your references to 
various species remind me of some of own tropical experiences 
and I wish that I might be able to visit that country at some 
time myself. Evidently the English Sparrow appears to be over¬ 
running South America as well as North America. It might be 
well for you to learn something if possible of the history of its 
introduction down there. 
I note your balance of $24.97 for the past fiscal year. 
You evidently estimated very closettpn the probable cost of your 
trip up to July 1. Your accounts‘were received and turned over 
to Mr. Ward. 
Please do not forget that we wish a fair representation of 
the smaller mammals as you worlnithrough the country. We shall 
look forward to your reports Srryour first shipment of specimens 
with the greatest interest. With best wishes, I am 
Sincerely yours 
Biological Investigations 
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