DESCRIPTIONS OF NEW BIRDS FROM SOUTH 

 AMERICA AND ADJACENT ISLANDS 



BY CHARLES B. CORY 



The following apparently new birds were contained in collections 

 secured by members of the various Field Museum of Natural History 

 South American Expeditions. Less than half of the material so far 

 received has been studied, and, as the final detailed report of the col- 

 lections will not be ready for publication for several months, it is de- 

 sirable to give advance descriptions of the novelties which from time 

 to time may be discovered. 



Crypturus tataupa peruviana subsp. nov. 



Type from San Ramon, west central Peru (alt. about 2900 ft.). 

 Adult male, No. 47123, Field Museum of Natural History. Collected 

 by M. P. Anderson, June 2, 1914. 



Similar to Crypturus tataupa tataupa, but differs in having the 

 chestnut brown of the upper parts decidedly darker (with a slight 

 vinaceous tinge in some lights). Breast more slaty gray; the brown 

 central markings on the feathers of the flanks much darker brown, and 

 the black markings on the under tail coverts heavier. 



Wing, 127; tarsus, 36; bill, 22 mm. 



Nothoprocta ambigua sp. nov. 



Type from Hda. Llagueda, N. E. of Otusco, Peru. Adult male, 

 No. 47157, Field Museum of Natural History. Collected by W. H. 

 Osgood and M. P. Anderson, March 16, 1912. 



Feathers of the upper parts broadly edged with gray, the gray 

 edging separated from the central black portion on most of the feathers 

 by a narrow line of buff; central portion of the feathers black, irregu- 

 larly marked in the middle and vermiculated at the tips with brown, 

 the markings being smaller, darker and much less ochraceous rufous 

 than in N. curmrostris; feathers of the crown with black centers edged 

 with rufous brown; feathers of the nape edged with tawny buff; lores, 



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