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)
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