514 BvUetin American Museum of Natural History. [Vol. XXXVI, 



feet altitude. Its intergradation with T. n. nigricapillus is shown under 

 the following form. 



Alto Bonito, 11 ; Dabeiba, 3; Bagado, 3; Juntas de Tamana, 4; Buena- 

 ventura, 2; San Jose, 9; Cisneros, 2. 



(3402a) Thryophilus nigricapillus connectens Chapm. 



Thryophilus nigricapillus connectens Chapm., BuU. A. M. N. H., XXXI, 1912, 

 p. 157 (Cocal, CoL). 



Char, svbsp. — Agreeing with Thryophilus nigricapillus schotti (Baird) but throat 

 white, unbarred, the breast less heavily barred; throat as in T. n. nigricapillus but 

 breast and remainder of underparts more heavily barred; the flanks and back much 

 richer ferruginous. 



This intermediate form evidently has a limited range in southwestern 

 Colombia where it ranges upward to at least 4000 feet on the western slope 

 of the Western Andes, a higher altitude than any at which we have found 

 T. n. schotti of northwestern Colombia. It is to be noted that the Ecuador 

 form, T. n. nigricapillus also reaches an altitude of at least 4000 feet, which 

 is the height above the sea of Nanegal, the type-locality of this race. Speci- 

 mens labeled "Quito" doubtless were collected at the upper limits of the 

 range of the species. They agree with others from Naranjo, Prov. Guayas, 

 and from Esmeraldas, showing that this form apparently occupies the entire 

 humid Tropical Zone of western Ecuador. 



One of six Esmeraldas specimens approaches connectens in having the 

 breast barred while of six Barbacoas specimens three have the upperparts 

 paler than in connectens and in this respect are nearer nigricapillus. As 

 might be expected, therefore, this is evidently the area of intergradation 

 between these two forms while somewhere between Cocal and Buenaventura 

 connectens merges with schotti. The region from Buenaventura to Es- 

 meraldas is evidently, therefore, the area of intergradation of schotti with 

 nigricapillus, and this intergrading form in the'region of its typical develop- 

 ment differs sufficiently from the forms it connects to deserve a name of its 

 own. Certainly it could not satisfactorily be referred to one or the other. 



Cocal, 7; Barbacoas, 6. 



(3403) Pheugopedius spadix Bangs. 



Pheugopedius spadix Bangs, Proc. Biol. Soc. Wash., XXIII, 1910, p. 74 (Naran- 

 jito, Rio Dagua, 3900 ft.). 



Apparently a rare species in the lower part of the Subtropical Zone of 

 the Pacific coast, whence we have but one specimen, but evidently more 



