338 Fietp Muszeum or Natura History — OrnitHotocy, Vot. I. 
Similar to D. m. mentalis (Temm.), but wing longer and entire 
throat whitish gradually shading into the pale yellowish of the under 
parts. 
Wing, 60; tail, 42; bill, 13 mm. 
I describe this new subspecies with hesitation, as the single specimen 
secured is somewhat immature; but the gray crown, olive gray back, 
and coloration of the under parts do not agree with immature specimens 
of D. m. mentalis which I have seen. 
Dysithamnus schistaceus hellmayri subsp. nov. 
Type from Rioja, Peru. Adult male, No. 49113, Field Museum of 
Natural History. Collected by W. H. Osgood and M. P. Anderson, 
July 4, 1912. 
Approaches D. s. heterogynus in general coloration, being darker 
gray than D. s. schistaceus. The bend of the wing and upper wing 
coverts are uniform schistaceous and there is apparently no white inter- 
scapular patch. The bill is heavier and longer than that of D. s. 
schistaceus and the feathers on the crown have black centers. The 
under wing coverts (except near the border) are yellowish white. 
Wing, 68; tail, 54; bill (culmen), 19; depth of bill at nostril, 8 mm. 
This is not unlikely the bird referred to by Hellmayr as “subspecies 
b” from Yurimaguas (Nov. Zool., 1907, p. 62), but I do not find that 
it has been given a name. 
Cercomacra huallage sp. nov. 
Type from Lagunas, Lower Huallaga River, Peru. Immature 
male, No. 41119, Field Museum of Natural History. Collected by 
M. P. Anderson, October 16, 1912. 
Entire upper parts slate gray, with the usual concealed patch of 
white on the interscapular region; crown more dusky and the back 
more bluish slate color. Feathers of the throat largely black, but more 
or less mixed with gray (probably due to immaturity). Breast and 
sides of body slate gray, becoming paler on the belly, and the feathers 
of the lower belly very narrowly tipped with whitish; upper wing 
coverts and bend of wing immaculate, with no white anywhere. Tail 
black, more or less tinged on the upper surface with slate color. Tail 
feathers, except the middle ones, very narrowly tipped with white. 
Wings blackish, the upper coverts like the back and the exposed edges 
of the quills very narrowly edged with slate color. 
Wing, 73; tail, 56; bill, 14 mm. 
