Vol. XXVIII, pp. 79-82 April 13, 1915 



PROCEEDINGS 



OF TUE 



BIOLOGICAL SOCIETY OF WASHINGTON 



PRELIMINARY DIAGNOSES OF APPARENTLY NEW 

 SOUTH AMERICAN BIRDS. 



BY W. E. CLYDE TODD. 



It is intended herewith to present brief diagnoses of such 

 birds, believed to be new to science, as have been discovered in 

 the collection of the Carnegie Museum since the publication of 

 the writer's last paper on the subject in these Proceedings 

 (Volume XXVI, 1913, 169-174). Several important collec- 

 tions of South American birds having come to hand in the 

 meantime, the full report on which will necessarily be delayed, 

 it has seemed best to publish the new forms discovered at once, 

 in this preliminary way, leaving their fuller discussion to a 

 future date, the circumstances which obtain appearing to justify 

 such a proceeding. The writer's acknowledgments are due to 

 Mr. Harry C. Oberholser for assistance in making certain com- 

 parisons and preparing sundry descriptions. 



Brachyspiza capensis hypoleuca subsp. nov. 



Differs from Brachyapiza capensis capensis (^liiller) in its much whiter 

 under parts, with little or no brownish or grayisli suffusion on the breast. 

 Decidedly smaller than B. c. pulacayensis Menegaux. Wing, 68; tail, 

 63; bill, 10. 



Type, No. 45,S()8, Collection Carnegie Museum, adult male; Rio 

 Bermejo, Argentina, May 21, 1914; Jose Steinbach. 



Sporophila hypochroma sp. nov. 



Nearest to Sporophila hypoxantha Cabanis, from which it differs in 

 having the rump and entire under parts rich bay, instead of tawny or 

 cinnamon rufous. 



Type, No. 43,922, Collection Carnegie Museum, adult male; Buena- 

 vista, Bolivia, January 25, 1912; Jose Steinbach. 



11— Pkoc. Biol. Soc. Wash.. Vol. XXVIII, 1915. (79) 



