386. 
388. 
389. 
442 SYSTEMATIC SYNOPSIS. — PASSERES— CLAMATORES. 
to Dakota and Missouri; migrating through all the E. U.8., wintering beyond. Nest in trees 
or bushes, usually the latter, in New England ny rate; nest in an upright crotch, thick- 
walled, deeply-cupped, more or less compact-walled, sometimes slovenly and resembling that of 
an Indigo-bird; in any case different entirely from the flat pewee-like saucer of acadicus; eggs 
not distinguishable from those of acadicus, though averaging smaller; very different from those 
of minimus. Note a flat ke/-wink ke'-wink, slowly. 
E, pusil/lus. (Lat. pusillus, puerile, petty.) LirrLe WESTERN FLYCATCHER. Replaces 
true trailli from the Plains to the Pacific; may usually be recognized by its more fuscous color- 
ation, the olivaceous and yellowish shades of trailli being subdued ; by its larger bill, and the 
feet nearly as in acadicus. But are not specimens absolutely like ¢radli found in the West ? 
The original Tyrannula pusilla of Sw., Fn. Bor.-Am., ii, 1831, 144; Aup., B. Am., 8vo. ed. 
ii, 1840, 236, pl. 66, is uncertain, just as likely have been minimus as this bird. I therefore 
pass over the name, which, if belonging here, antedates trailli, and adopt trailli for the eastern 
form (although Audubon says ‘‘ Arkansas to the Columbia”), taking pusillus of Baird for the 
Western variety. This is the usual ‘‘little flycatcher” in Western woodland, generally dis- 
tributed. Habits, nest and eggs counterparts of those of trail. 
E. mi/fnimus. (Lat. minimus, smallest.) Least FuycATcHEer. Colors almost exactly as 
in trailli; usually, however, olive-gray rather than olive-brown; the wing-markings, eye-ring 
and loral feathers plain grayish-white; the whole anterior parts often with a slight ashy east ; 
under mandible ordinarily dusky ; feet perfectly black. It is a smaller bird than tradlli, and 
not so stoutly built; the wing-tip projects only about half an inch beyond the secondaries ; the 
5th quill is but very little shorter than the 4th, the lst apt to be nearer 6th than 5th ; the feet 
are differently proportioned, being much as in acadicus; the bill is obviously under half an 
inch long. Length 5.00-5.50; extent about 8.00; wing 2.60 or less; tail about 2.25. A 
series of g g, measured fresh, runs 5.20-5.50 long, by 7.60-8.30 in extent; several 9 9 are 
4.80-5.10 long, by 7.40-7.90 in extent. Although a large @ may grade up to 9 trailli in 
size, aud there is no obviously different coloration, it is a different bird. Eastern N. Am. to the 
Plains, very abundant in the U.S. during the migrations, in orchards, coppices, hedgerows, and 
the skirts of woods rather than in heavy forests. The commonest breeder in New England, 
especially Massachusetts; very common along Red River of the North, breeding at 49°. Ranges 
through E. U.S. in migration; winters extralimital. Nest in upright crotch of tree, shrub, 
or sapling; small, neat, compact-walled, deeply-cupped ; eggs 3-4, white, normally wnmarked, 
rarely speckled, 0.60-0.69 long, averaging 0.65 X 0.51. Note a sharp che-bec’, or se-wick’, 
quickly. 
E. flaviven’tris. (Lat. flavus, yellow, ventris, of the belly.) YELLOW-BELLIED FLYCATCHER. 
Above, olive-green, clear, continuous and uniform as in acadicus, or even brighter; below, not 
merely yellowish, as in the foregoing, but emphatically yellow, bright and pure on the belly, 
shaded on the sides and anteriorly with a paler tint of the color of the back ; eye-ring and wing- 
markings yellow; under mandible yellow ; feet black. In respect of color, this species differs 
materially from all the rest; none of them, even at their autumnal yellowest, quite match it. 
Size of trailli, or rather less; feet proportioned as in acadicus; bill nearly as in minimus, but 
rather larger; Ist quill usually equal to 6th. Eastern U. 8. and British Provinces, common, 
in woodland, swamps and shrubbery. Breeds probably from the Middle States northward. 
There has been much misunderstanding about the nest and eggs of this bird; the latter are 
described by Brewer and by Coues (1874) as white. Nest in swamps, close to ground, in a 
stump, log, or roots of an upturned tree, thick and bulky, of mosses, ete., deeply cupped ; 
eggs spotted. Note a low soft pe-a, slowly. 
E. f. diffi'cilis? (Lat. difficilis, dis-facilis, difficult, un-doable; very appropriate!) WESTERN 
YELLOW-BELLIED FrycaTcHEer. Not tangibly distinct from flaviventris; coloration dingy, 
instead of pure olivaceous and yellow, the latter dulled with an ochrey shade ; tail said te be 
longer. Western U. 8., abundant. Eggs speckled. 
