BIRD LIFE IN THE URUBAMBA VALI.EY OF PERU. 73 



female from the Rio Cosireni, however, has an unspotted throat and 

 is clearly, therefore, not to be referred to true auratus. The identifica- 

 tion of this specimen has necessitated a study of the specimens of 

 the auratus group in our collections, including topotypes of auran- 

 tiicinctus Dalmas, and the type of insperatus Cherrie, to which, 

 through the kindness of Mr. Bangs, has been added the type of 

 holivianus Ridgway, in which the following conclusions have been 

 reached : 



CAPITO AURATUS AURATUS (Dumont). 



The female is distinguished from other members of the group by 

 its heavily spotted throat. In the male the crown averages darker 

 than in other forms, ranging from brownish olive to Saccardo's 

 olive tinged anteriorly with old gold. Colombian specimens can be 

 matched in this respect by Orinoco birds (aurantiicinctu.s) , but in 

 the latter the crown averages paler, the yellow areas deeper, and 

 the rump and abdomen are often marked with orange. 



Specimens examined — Colombia: Buena Vista, above Villavicencio> 

 4 males, 4 females; La Morelia, 1 female; "Bogota,'' 1 female 

 Ecuador: Napo, 1 female; Maranon, 1 male; "Ecuador,'' 1 male. 



CAPITO AURATUS AURANTIICINCTUS Dalmas. 



Capita auranfiicinctus Dalmas, BulL Soc. Zool. France, 1900, p. 178 (Caura 



River, Ven.). 

 Capito auratus intermedius Berlepsch and Hartert, Nov. Zool., vol. 9, 1902, 



p. 98 (Nericagua, upper Orinoco, Ven.). 

 Capito auratus bolivianus Ridgway, Proc. Biol. Soc. Wash., vol. 25, 1912, p. 87. 



Further examination of our material from the Orinoco confirms 

 my belief that there is but one form in this region. The orange 

 abdominal band and orange marked rump, said to be characteristic 

 of aurantiicinctus, is evidently not constant. In one of our males 

 from La Union, on the lower Caura, this feature is pronounced, in 

 the other it is wanting below and barely suggested above. In two 

 males from the Cunucunuma River, the band below is weU-marked, 

 in three others it it less evident. Three of these birds have orange 

 on the rump, in the fourth this character is lacking. In view of this 

 variability in the character which is alleged to separate intennedius 

 from aurantiicinctus, and the proximity of the Cunucunuma to the 

 type locality of intermedius, I am convinced that the latter is not a 

 valid race and I refer all our Orinoco specimens to aurantiicinctus. 



Specimens examined. — La Union, Caura River, Venezuela, 2 males 

 (topotypes); Boca de Sina, Cunucunuma River (near Mount Duida), 

 Venezuela, 4 males, 2 females. 



CAPITO AURATUS INSPERATUS Cherrie. 



The crown in this race is paler than in any of the other forms, being 

 in both sexes uniformly sulphine-yeUow; a color not shov/n in the 



