Cory—A Review of Siptornis and Cranioleuca. 155 
i8, Upper tail coverts brownish like back and rump. 
1. Upper parts pale brown (between wood brown 
and buffy brown); throat spot (in adult) tawny 
tufous Cranioleuca sordida sordida (Lesson). 
(Chili.) 
2. Similar but upper parts darker (more fuscous 
brown); throat spot similar 
Cranioleuca sordida flavogularis (Gould). 
(Santa Cruz, Patagonia.) 
3. Similar but upper parts still darker; under parts 
whitish gray; throat spot rufous chestnut 
Cranioleuca sordida affinis (Berlepsch). 
(Las Vasques, Tucuman, Argentina.) 
i’, Four outer pairs of tail feathers uniform rufous or 
brownish rufous. 
1. Two middle pairs of tail feathers dusky brown (at 
least on inner webs); tail feathers pointed; throat 
spot tawny; under parts tinged with tawny 
Cranioleuca heterura (Oustalet).* 
(Tucuman, Argentina.) 
2. Four outer tail feathers uniform brownish rufous; 
two middle pairs with more or less blackish; tail 
feathers not sharply pointed 
Cranioleuca pudibunda (Sclater).t 
(Obraillo, C. Peru.) 
j®. Outer tail feather more or less bicolor (not uniformly 
colored to base). 
j’. Middle pair of tail feathers with outer webs rufous, 
inner webs blackish. 
1. Outer tail feather with at least basal part of inner 
web dusky brown or blackish; all tail feathers 
including middle pair with more or less blackish 
and rufous; throat spot tawny rufous 
Cranioleuca modesta modesta (Eyton). 
(Chili.) 
2. Similar but upper parts sandy earth brown; wings 
and tail longer 
Cranioleuca modesta sajamae (Berlepsch). 
(Esperanza, Sajama, W. Bolivia). 
8. Similar but throat spot (in adult) chestnut rufous; 
bill longer (about 15 mm.) 
Cranioleuca modesta rostrata (Berlepsch). 
(Vacas, E. Bolivia.) 
* T have not seen this species, which may belong to a different genus. 
t I have not seen this species, which is described by Sclater (and also Taczanowski) as 
having the two middle pairs of rectrices only marked with blackish on inner webs, the rest 
of the tail feathers uniform. Berlepsch, however (J.f.O., 1901, p. 93 in text) states that 
pudibunda has the 2d to 4th pair blackish on inner webs. As no specimens are available, 
T have been forced to include it in both sections. 
