AUGUST, 1915. NOTES ON SOUTH AMERICAN BIRDS CORY. 307 



Similar to 5. w. melanoleucus , but much smaller. 



Wing, 160; tail, 118; bill, 38 mm. 



Birds from Macaco Secco, near Andarahy, Bahia, are apparently 

 intermediate in size between 5. m. melanoleucus and S. m. cearce, and 

 might be referred to either form, the measurements of the male being: 

 wing, 175; tail, 125; bill, 39 mm. But in a series of specimens from 

 Guiana, which I assume to represent typical 5. m. melanoleucus, the 

 average measurements of the males are: wing, 188; tail, 140; bill, 

 40 mm. 



Scapaneus pallens peruviana subsp. nov. 



Type from Molinopampa, Peru. Adult female, No. 44816, Field 

 Museum of Natural History. Collected by W. H. Osgood and M. P. 

 Anderson, June 18, 1912. 



Similar to 5. p. pollens from Colombia, but differs in having^the 

 under parts darker and more chestnut buff; the black bars heavier and 

 clearly marked on the lower abdomen, flanks and under tail coverts; the 

 white patch on the back more strongly tinged with buff; and the rump 

 and the upper tail coverts deeper ochraceous buff without bars. 



Wing, 170; tail, 125; bill, 45 mm. 



DESCRIPTIVE KEY TO THE SOUTH AMERICAN SPECIES AND SUB- 

 SPECIES BELONGING TO THE GENUS Piaya 



(Colors as given in Ridgway's Color Standards and Color Nomenclature, 

 Washington, 1912. Type localities given in parenthesis.) 



I. Crown gray, very different from the back. 



Bill red; back hazel; throat and breast cinnamon rufous; 

 abdomen dull black; wing, about 130; tail, about 225; culmen, 

 25; depth of bill, 12 mm. 



Piaya melanogaster melanogaster (Vieill.). 



(Guiana) Guiana and northern Brazil, 



Ecuador? 



Similar but paler; upper parts and throat more tawny; bill 

 somewhat smaller; wing, about 130; tail, about 225; culmen, 

 23; depth of bill, 10 mm. 



Piaya melanogaster ochracea Cory. (Yuri- 



maguas, Peru) Peru. 



II. Crown nearly the same color as the back. 



A. Size small; wing less than 115 mm. (4.50 in.). 



