1912.] NATURAL SCIENCES OF PHILADELPHIA. 365 



A NEW SYNALLAXIS. 

 BY WITMER STONE. 



In a collection of birds made by Air. Samuel N. Rhoads in Ecuador 

 in 1911, and recently acquired by the Academy, there are several 

 specimens of a Synallaxis which appears to be undescribed, although 

 individuals of apparently the same form have been taken by previous 

 explorers and referred to S. gularis. From typical S. gularis Lafr. 

 from Bogota the Ecuador birds differ very decidedly; the upper 

 surface is much darker and less tawny, while the lower parts are 

 uniform pale tawny olive with no rusty tints on the side nor gray 

 on the breast; the white gular patch and superciliaries are not so 

 pure and the white of the lores and frontlet much obscured with 

 brown and gray. 



Birds from the Cauca Valley, Colombia, recently described by 

 Mr. F. M. Chapman as Synallaxis gularis rufipectus, are much 

 closer to the Ecuadorian form, having the lower parts uniform, with 

 no trace of gray on the breast, but the colors above and below are 

 much brighter and richer, especially the under parts, while the bill 

 seems to average stronger and heavier. 



The Ecuador bird may be known as 



Synallaxis gularis pichinchse subsp. nov. 



Type, No. 59,432, Collection Academy of Natural Sciences of Philadelphia, 

 c?, May 1, 1911. Hacienda Garzon, southern foot of Mt. Pichincha, 

 Ecuador, 10,800 ft. elevation. Collected by Samuel N. Rhoads. 



Upper parts uniform raw umber 1 with a slight russet tinge, tail 

 chestnut; lower parts uniform pale tawny olive inclining to isabella 

 color, slightly darker on the sides of the body, gular patch rather 

 dull white, narrow superciliaries white, lores gray, with a dull white 

 stripe above, forming the anterior extension of the superciliary. 

 Wing 58 mm. Culmen 12 mm. 



A female obtained at the same locality, May 17, and another 

 male, May 5, correspond exactly with the type. 



My thanks are due to Mr. F. M. Chapman, curator of ornithology 

 in the American Museum of Natural History, for the loan of speci- 

 mens of the new forms of this group recently described by him, as 

 well as for typical specimens of S. gularis, one of which had been 

 compared with the type. These specimens were invaluable in 

 determining the relationships of the Ecuador bird. 



Colors named according to Ridgway's Nomenclature of Colors, Boston, 1886. 



