BIRDS OF NORTH AND MIDDLE AMERICA. 53 
to rather strongly uncinate; maxillary tomium straight, distinctly 
notched subterminally; mandibular tomium nearly straight, minutely 
toothed and notched subterminally, the tip of mandible forming a short 
recurved point; gonys gently convex, slightly ascending terminally, 
not prominent basally. Nostril exposed, posteriorly in contact with 
feathering of latero-frontal antiz, roundish or broadly oval, its upper- 
posterior margin membraneous, the interior tubercle visible within 
posterior portion. Rictal bristles present but minute, the feathers of 
chin, anterior portion of malar region, and lores with long terminal 
sete. Wing moderate, with longest primaries extending to decidedly 
beyond secondaries; sixth and seventh, or fourth, fifth and second, 
primaries longest, the tenth (outermost) less than three-fifths but 
more than half as long as the longest, the ninth about equal to or 
slightly shorter than secondaries. Tail a little more than half to 
more than two-thirds as long as wing, slightly rounded or nearly 
even, the rectrices (12) narrow, subrounded or subacuminate ter- 
minally. Tarsus much longer than exposed culmen, about one-third 
as long as wing, slender, the acrotarsium distinctly scutellate, the 
plantar scutella in two longitudinal series, less distinct on outer side; 
middle toe, with claw, much shorter than tarsus; outer toe, without 
claw, reaching to slightly beyond middle of subterminal phalanx of 
middle toe, the inner toe a little shorter; hallux about as long as 
inner toe, but much stouter; basal phalanx of middle toe wholly 
united to outer toe, for about half its length to inner toe; claws 
moderate in size and curvature, that of the hallux decidedly shorter 
than the digit. Plumage full, soft, and blended, longer and more 
lax on rump; pileum not crested. 
Coloration.—Adult males olive or olive-greenish above, the head 
and neck gray or slate-colored (sometimes streaked or spotted with 
blackish), the lesser wing-coverts black, spotted with white or with a 
white area on inner-anterior portion; under parts mostly whitish or 
yellowish (at least medially), the throat and chest sometimes streaked 
with gray or blackish. Adult females duller in color, with pileum 
rufescent. 
Range.—Guatemala to British Guiana, southeastern Brazil, Para- 
guay, Bolivia, and Peru. (About ten species.) 
aT have not seen D. guttwlatus (Lichtenstein), D. tambillanus Taczanowski, D. 
xanthopterus Burmeister, nor D. flemingi Hartert. All these except D. xanthopterus 
appear, however, to be congeneric with D. mentalis, etc., so far as I am able to judge 
from descriptions; but the style of coloration is so different in D. xanthopterus (chest- 
nut-rufous wings and lower back, white spots on sides of head, etc.) that I doubt its 
close relationship. 
D. leucostictus Sclater, D. schistaceus (D’Orbigny), D. ardesiacus Sclater and Salvin, 
D. unicolor Sclater, and D. subplumbeus Sclater and Salvin, I unhesitatingly exclude, 
as being much more nearly related to the genus Erionotus Cabanis and Heine (= Tham- 
nophilus, part, of Sclater). 
D. plumbeus (Maximilian) I have seen but have not now at hand, and therefore 
can not verify my impression that it is congeneric with D. mentalis and allies. 
