156 Proceedings of the Biological Society of Washington. 



k 7 . Middle pair of tail feathers uniform pale tawny. 



1. Throat spot (in adult) rufous 



Cranioleuca hilereii (Oustalet). 



(Tucuman, Argentina.) 



e 3 . Throat uniform pale grayish (no bright colored throat spot in 



adult. 



1 . Outer tail feather with outer web rufous, rest of tail feathers 



blackish; upper parts mouse brown or grayish earthy 



brown ; under parts grayish ; under wing coverts ochraceous 



cinnamon; lower belly and flanks buffy ochraceous 



Cranioleuca patagonica (d'Orbigny;. 



(Rio Negro, Patagonia.) 

 b. Color of cap and back very different. 



b 1 . Cap, wings (externally) and tail rufous, chestnut or rusty brownish. 

 b 2 . Breast not distinctly streaked or spotted. 



b 3 . Face and sides of head not rufous or cinnamon. 

 b 4 . With a distinct superciliary stripe. 

 b 5 . Cap streaked with black. 



1 . Similar to antisiensis, but crown streaked with black 



Cranioleuca hellmayri (Bangs). 

 (Santa Marta, Colombia.) 

 c 5 . Cap not streaked with black, 

 c. Smaller, wing less than 62. 



1. Under parts ochraceous; back brownish; superciliary 

 stripe white or whitish 



Cranioleuca pallida (Wied). 

 (Campos Geraes, S. E. Brazil.) 

 d 6 . Larger, wing more than 60. 



1. Under parts ochraceous; back olivaceous; supercili- 



ary stripe tawny 



Cranioleuca furcata (Taczanowski). 

 (Chirimoto, N. E. Peru.) 



2. Under parts pale grayish; upper parts brown; lores 



and superciliary stripe whitish; wing less than 70 

 mm. Cranioleuca antisiensis antisiensis (Sclater). 



(Cuenca, Ecuador.) 



3. Similar but superciliaries purer white and ear coverts 



more grayish; under parts somewhat pale 



Cranioleuca antisiensis cisandina (Taczanowski). 



(Huambo, N. Peru.) 



4. Upper parts grayish mouse color; throat white; wing 



more than 70 mm., otherwise approaches antisiensis, 

 but larger Cranioleuca baroni (Salvin). 



(Huamachuco, E. Central Peru.) 

 c 4 . Without a distinct superciliary stripe. 



1 . Upper parts brown tinged with rufous ; crown and forehead 

 nearly uniform in color; throat whitish 



Cranioleuca curtata curtata (Sclater). 

 (Bogota, Colombia.) 



