AUGUST, 1915. NOTES ON SOUTH AMERICAN BIRDS CORY. 335 



b. Back vinaceous cinnamon. 



Wing less than 170; some specimens have exposed 

 spots on sides of abdomen; very young birds are much 

 spotted on the under parts. 



C. s. brevipennis, p. 332. 



B. Under parts without black spots or with black spots confined 

 to the sides and largely concealed when the wing is closed. 



a. Back rufous cinnamon. 



Breast pale, only slightly tinged with pale ochraceous 

 cinnamon or isabella buff; dark bars on inner webs 

 of primaries not unusually restricted and white areas 

 not unusually large; inner web of outer rectrix normal- 

 ly rufous. 



C. s. isabellina, p. 328. 



Breast washed with pale ochraceous cinnamon; 

 greater portion of inner webs of primaries white, 

 many of the dark bars being short and irregular; inner 

 web of outer rectrix rufous. 



C. s. distincta, p. 330. 



b. Back vinaceous cinnamon. 



Breast and more or less of under parts usually strong- 

 ly tinged with ochraceous cinnamon; wing more than 

 170; inner webs of outer rectrices normally black and 

 white. 



C. s. margaritensis*, p. 331. 



Breast and more or less of under parts usually 

 strongly tinged with ochraceous rufous; wing less than 

 170; inner web of outer rectrix normally black and 

 white. 



C. 5. brevipennis, p. 332. 



* C. s. margaritensis and C. s. brevipennis properly belong in Group I, but an 

 exceptionally pale specimen might be looked for here. 



