UNITED 
7 
sN^tes national museum 
SMITHSONIAN INSTITUTION 
WASHINGTON, D. C. 
OFFICIAL BUSINESS. 
A penalty of $300 is fixed by lavr 
for using this envelope for other than 
Official Business. 
U. S. NATIONAL MUSEUM, 
WASHINGTON, 
SECTION OF BIRDS’ EGGS. 
D. C. 
