588 Bulletin American Museum of Natural History. [Vol. XXXVI, 



(4103) Tanagra cyanocephala cyanocephala ( Vieill.). 



Pipra cyanocephala Vieill., Nouv. Diet. d'Hist. Nat., XIX, 1818, p. 165 (Trini- 

 dad). 



A wide-ranging but apparently not common species. Males from the 

 west slope of the Western Andes agree with others from the eastern slope 

 of the Eastern Andes and all are like a good series from near Merida. One 

 of three Ecuador males (labeled "Quito") has the yellow areas decidedly 

 paler than in Colombian specimens and evidently represents pelzelni Scl., 

 but a second ' Quito ' specimen and one from Valle de Cumbaza, Mt. Chim- 

 borazo, are very close to Venezuela specimens. A specimen from La Sierra, 

 south of Popayan resembles these two Ecuador specimens and if pelzelni be a 

 valid form should possibly be referred to it. 



Caldas, 1 9 , 2 cf cf ; " Antioquia," 1 cf ; La Sierra, 1 cf ; Buena Vista, 

 2(fd', 1 9. 



(4106) Tanagra aurea pileata (Berl.). 



Euphonia aurea pileata Berl., Rev. Tan. Int. Orn. Cong., 1910, p. 1014 (Quiribana 

 de Caicara, Venezuela). 



A male from Buena Vista above Villavicencio is evidently to be referred 

 to this lately described race. It agrees in color, but is somewhat smaller 

 (wing 56 mm.) than an essentially topotypical specimen of pileata, from 

 Maripa, Venezuela (wing 58 mm.). 



Buena Vista, 1. 



(4112) Tanagra xanthogastra chocoensis (Hellm.). 



Euphonia xanthogaster chocoensis Hellm., Rev. Franc. d'Orn., II, 1911, p. 23 

 (Rio Cajon, w. Col.); P. Z. S., 1911, p. 1100 (Noanamd; Cajon; Sipi). 

 Euphonia xanthogastra Scl. & Salv., P. Z. S., 1879, p. 498 (Concordia). 



Inhabits the Tropical and Subtropical Zones from the Pacific Coast east 

 to the western slope of the Central Andes. 



Specimens from the Pacific coast region are typical of this form and differ 

 from T. X. brevirostris in the paler color of the yellow areas, particularly of 

 the crown. In size, however, birds from approximately the same altitudes 

 agree. Thus specimens from San Jose and Barbacoas are of about the same 

 size as those from La Morelia; again, San Antonio or Miraflores specimens, 

 while resembling chocoensis in color are as large as specimens of brevirostris 

 from La Palma and La Candela. Apparently, therefore, with both forms 

 there is a corresponding increase in size with increase in altitude. 



