156 Proceedings of the Biological Society of Washington. 
k?. Middle pair of tail feathers uniform pale tawny. 
1. Throat spot (in adult) rufous 
Cranioleuca hilereti (Oustalet). 
(Tucuman, Argentina.) 
e’. 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!. Cap, wings (externally) and tail rufous, chestnut or rusty brownish. 
b2. Breast not distinctly streaked or spotted. 
b3, Face and sides of head not rufous or cinnamon. 
b‘. With a distinct superciliary stripe. 
b®. Cap streaked with black. 
1. Similar to antisiensis, but crown streaked with black 
Cranioleuca hellmayri (Bangs). 
(Santa Marta, Colombia.) 
c®. 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, 8. E. Brazil.) 
d°. 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.) 
e4. 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.) 
