Vol S XV ] Bangs and Noble, Birds of Peru. 457 



vals and with great force. The sound is very rhythmic and often so pro- 

 longed that it becomes exceedingly monotonous. 



Heleodytes fasciatus (Swainson). Five specimens, one immature 

 male and adults of both sexes, Huancabamba, August. 



The young bird differs from the adult in having the whole crown uniform 

 dark brown, and in having a conspicuous superciliary stripe. 



This form in spite of its decidedly darker coloration is possibly only 

 subspecifically distinct from the former. The ranges of the two species are 

 adjacent and apparently do not overlap. The light colored form occurs 

 only in the coastal desert, and is replaced by the dark one at the foothills 

 of the Andes. Both species, — or geographical races — were found abun- 

 dantly, and their harsh scolding note was often heard, but never in the 

 region east of Tabaconas. 



Pheugopedius sclateri (Tacz.). Two adults, male and female, 

 Bellavista, September. 



Troglodytes musculus albicans Berl. & Tacz. Four specimens, 

 three adult males and an adult female, Huancabamba and Bellavista, 

 August and September. 



We have no hesitation in referring the three males taken at Huan- 

 cabamba to this west Ecuador form, which they very closely resemble. 

 The one adult female from Bellavista is however, slightly larger and darker 

 in color, and though in somewhat well worn plumage, the obsolete dark 

 barring of the back is more evident. It is, we consider, an intermediate 

 approaching T. musculus tecellatus (Lafr. and d'Orb.). 



Corvidae. 



Cyanocorax mystacalis (Geoffr.). One adult female, Sullana, August 

 1. 



On the western range of the Andes and even along the coast this Jay is 

 fairly abundant, but it is replaced on the other ranges and in the interior 

 by the following species. 



Xanthoura yncas yncas (Bodd.). Seven specimens, one immature 

 male and adults of both sexes, Tabaconas, August and September. 



An adult male No. 79885 has a queer asymmetrical tail, which made 

 him very conspicuous in life, as he hopped about in the scrub, occasionally 

 spreading it. The three outer rectrices, normally yellow, on the left hand 

 side are pinkish salmon color (varying on the different feathers or parts of 

 the feathers from Orange Pink and Light Salmon Orange to Salmon Color, 

 of Ridgway). A few of the under tail coverts and some feathers on the 

 flank on the left side, are also of this pink color. 



Vireonidae. 



Vireosylva chivi griseibarbatus Berl. & Tacz. Four adults, both 

 sexes, Bellavista and Perico, September. 



