Cory — A Review of Siptornis and Cranioleuca. 153 



2. Primaries not edged with rufous 



Cranioleuca ruticilla (Cabanis and Heine). 

 (Buenos Aires, Argentina.) 

 c 4 . Under parts white, whitish or grayish white. 



1. Size larger; middle rectrices uniform to the ends 

 Cranioleuca slriaticeps strialiceps (d'Orbigny and Lafresnaye). 



(Bolivia.) 



2. Size smaller; middle rectrices with inner webs tinged with 



dusky and dusky ends 



Cranioleuca striaticeps helerocerca (Berlepsch). 



(Cosquin, Cordova, Argentina.) 

 c 3 . Crown not streaked. 



c. Flanks streaked with black or blackish. 



1. Under parts white or whitish; wings blackish bordered 

 with mouse color Siptomopsis hypochondriacus (Salvin) 



(Melea, Cajabamba, Peru.) 

 d 4 . Flanks not streaked with black. 



1. Edges of wing coverts rufous; basal part of outer webs of 

 remiges pale rufous forming a band; a sulphur yellow throat 

 spot (adult) ; no throat spot; under parts more or less tinged 

 with ochraceous or pale tawny; crown and back buff y brown 

 (immature) Cranioleuca sulphurifera (Burmeister). 



(Buenos Aires, Argentina.) 



2. Wing coverts and tail dark rufous; under parts ochraceous; 



crown and back tinged with olivaceous (immature); 

 cap rufous (adult) Cranioleuca pallida (Wied). 



(Campos Geraes, S. E. Brazil.) 

 '. Some tail feathers (at least) bicolored, marked or bordered with 



differently colored ends or bases, 

 c. Throat white, the feathers with black or brown points or spots; 

 breast (at least) with narrow shaft streaks (no colored throat 

 patch). 



1. Wing coverts, flanks and lower abdomen rufous brown; a 



white superciliary stripe; tail dark brown, the outer webs 

 of the two outer feathers largely rufous brown 



Cranioleuca humicola humicola (Kittlitz). 

 (Valparaiso, Chili.) 



2. Similar but wing coverts, flanks and lower abdomen more 



rusty brown; superciliary stripe but slightly indicated or 

 absent 



Cranioleuca humicola steinbachi (Hartert and Venturi). 



(Cachi, Prov. Salta, Argentina.) 

 d 3 . Throat (in adult) with patch or spot of rufous, chestnut or 

 tawny; throat spot absent or faint in immature. 

 d 4 . Tail more than 90 mm. long. 



1. Tail feathers rufous shading to dusky rufous towards the 

 ends; crown and back brown; forehead rufous; throat 

 spot (in adult) rufous 



Pseudosiptornis ottonis (Berlepsch). 

 (Cuzco, Peru.) 



