86 BREWSTER, Descriptions of New Birds. [April 
Empidonax pulverius,* new species. —SIERRA MADRE FLYCATCHER. 
Spec. Cuar.— Similar to &. cézerztius Brews., but much larger, the bill 
slenderer, the coloring of the under parts darker and more uniform. 
& ad. (No. 14,387, collection of W. Brewster, Pinos Altos, Chihuahua, 
Mexico, June 23, 1888; M. Abbott Frazar). Above faded, somewhat gray- 
ish hair-brown, the pileum and nape tinged with olive, the forehead de- 
cidedly grayish, the feathers of the crown with dark brown centres; wings 
and tail dark hair-brown (almost clove-brown on the wings), the outer 
webs of the outer tail feathers brownish white to the shaft excepting at 
the tip, the secondaries and inner primaries narrowly, the greater and 
middle wing-coverts broadly, tipped (and near the apices margined also) 
with brownish white; bend of wing, under wing-coverts, crissum, flanks, 
and a narrow space on the centre of the abdomen pale yellow; remainder 
of under parts nearly uniform dull brownish gray, with a tinge of yellow- 
ish olive, most pronounced on the jugulum and middle of the breast, ap- 
parently wanting on the middle of the throat (the darkest colored area 
beneath) which with the nearly concolored sides of head and neck is 
scarcely lighter than the back. The eye is encircled by a well-marked 
white or whitish ring, interrupted by a dusky space on the upper eyelid. 
Lower mandible wholly straw-yellow. Wing, 2.93; tail, 2.60; tarsus, 
.62; length of culmen: from base, .53; from feathers, .44; from nostril, 
.36; width of bill at nostril, .20 inch. 
2 ad. (No. 14,388, collection of W. Brewster, Pinos Altos, Chihuahua, 
Mexico, June 6, 1888; M. Abbott Frazar). Similar to the male, but the 
entire upper parts tinged slightly with olive; the under parts lighter, 
with the entire abdomen and flanks pale brownish yellow, the throat 
with some whitish, the ring around the eye continuous and broader. 
Wing, 2.80; tail, 2.47; tarsus, .65: length of culmen: from _ base, 
-55; from feathers, .40; from nostril, .30; width of bill at nostril, 
-19 inch. 
Habitat. Sierra Madre Mountains of Chihuahua (Pinos Al- 
tos), Mexico. 
Although this Flycatcher has a bill nearly as narrow, propor- 
tionately, as average specimens of the Z. obscurus group, and a 
general coloring quite as dark as 2. hammondz, the dark extreme 
of that group, its wholly yellow under mandible and general, 
albeit very faint, yellowish tinge beneath attest its closer affinity 
with the yellow-billed Apzdonaces of the faviventris-difficeles 
type, with which it is connected through the intermediate form 
cinerttius. It is impossible, however, to regard it as a subspecies 
of diffiicilis, for 1 have perfectly typical specimens of both pz- 
* Pulverius = dust-colored, 
