22 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I39 



Hacienda Belen), crossing to the Rio Magdalena drainage on the 

 Quebrada Enanea (Volador). 



Remarks. — The typical form of this race, with the throat and fore- 

 neck distinctly barred with black, is found mainly in the Choco. In 

 southwestern Colombia, through western Cauca, the throat barring 

 disappears, and in Nariiio the breast appears whiter as the barring 

 on this area is reduced. The birds of this region are intergrades of 

 unstable character between schottii and nigricapillus. The influence 

 of the reditus style of markings produces similar intergrades on the 

 opposite side of the range, beginning in northern Choco at Acandi on 

 the Gulf of Uraba, and extending across to the upper Sinu Valley 

 and the lower Nechi. Specimens from this area are identical in appear- 

 ance with those of western Cauca which Chapman named connect ens. 

 Under these circumstances there is no basis for recognition of such a 

 race, as the supposed characters, unstable at best, are duplicated on 

 the opposite side of the population of typical schottii. The birds 

 described are allocated as intermediates to schottii, except for those 

 of Nariiio which are placed best with typical nigricapillus. 



THRYOTHORUS NIGRICAPILLUS NIGRICAPILLUS Sclater 



Thryothorus nigricapillus Sclater, Proc. Zool. Soc. London, pt. 28, May i860, 

 p. 84. (Nanegal, 4,000 feet elevation, Ecuador.) 



Characters. — Similar to T. n. schottii, but averaging lighter brown 

 on back, flanks, and under tail coverts ; throat, f oreneck, and center of 

 upper breast immaculate, with the barring reduced on the sides. 



Measurements. — Males (13 specimens), wing 62.6-67.1 (65.1), tail 

 44.2-50.8 (48.1), culmen from base 19.1-20.9 (20.1), tarsus 24.0-25.5 

 (24.6) mm. 



Females (6 specimens), wing 63.9-66.8 (65.5), tail 46.6-50.7 

 (48.7), culmen from base 19.2-21.6 (20.0), tarsus 23.0-25.3 (24.2) 

 mm. 



Range. — From western Nariiio (intermediate) in Colombia south 

 through the tropical zone of western Ecuador, nearly to the boundary 

 with Peru. 



Remarks. — As indicated under schottii, specimens from Nariiio are 

 intermediate. 



Family Mimidae : Mockingbirds, Thrashers 



DUMETELLA CAROLINENSIS (Linnaeus): Catbird, Pajaro Gato 



Muscicapa carolitiensis Linnaeus, Systema naturae, ed. 12, vol. 1, 1766, p. 328. 

 (Virginia.) 



Three were noted, and one female was collected. 



