Cory—A Review of Siptornis and Cranioleuca. 157 
2. Similar but forehead brownish olive; size somewhat smaller 
Cranioleuca curtata debilis (Berlepsch and Stolzmann). 
(Marcapata, $. E. Peru.) 
c*. Face and sides of head rufous or cinnamon. 
ec. Middle pair of rectrices russet brown (different color from 
rest of tail). 
I. Cranioleuca erythrops erythrops Sclater). 
(Pallatanga, Ecuador.) 
d‘. Middle pair of rectrices cinnamon rufous like rest of tail. 
1. Chest grayish; rufous of crown extending to nape 
Cranioleuca erythrops griseigularis (Ridgway). 
‘San Antonio, Rio Cali, N. W. Colombia.) 
2. Chest light buffy olive; rufous of crown not extending to 
nape Crantoleuca erythrops rufigenis (Lawrence). 
(Costa Rica.) 
e?. Breast distinctly streaked or with irregular spots. 
1. Back reddish brown; crown somewhat darker; breast brownish 
olivaceous with whitish streaks; superciliary stripe white; 
belly plain Siptornis striaticollis (Lafresnaye). 
(Bogota.) 
2. Back brown; breast pale grayish brown marked with black 
points or spots to the feathers, belly with obscure blackish 
bars Cranioleuca gutturaia (Lafresnaye). 
(Yuracares, Bolivia.) 
ec. Cap white or brownish white (very different from back); tail and 
more or less of wing coverts rufous. 
1. Upper back rufous; lower back brownish; under parts olivaceous 
brown; size smaller 
Cranioleuca albiceps (d’Orbigny and Lafresnaye). 
(Sica-Sica, Bolivia.) 
2. Upper parts olive brown: cap brownish white; throat and fore- 
neck whitish; rest of under parts pale earthy brown 
Cranioleuca albicapilla (Cabanis). 
(Maraynioc, Peru.) 
B. Back distinctly streaked. 
a. Under parts (at least. below the throat) not streaked. 
al. Upper parts dark olive brown streaked with blackish. 
a‘. Outer tail feathers uniform (plain rufous or brownish rufous); 
under parts not buffy white. 
1. Three outer tail feathers plain rufous; size smaller, wing about 
60 mm.; throat spot rufous; breast and sides more or less 
tinged with brownish olivaceous 
Cranioleuca wyatti ‘Sclater and Salvin). 
(Santa Marta, Colombia.) 
