3. M. crinitus. Outer webs of primaries distinctly edged with rufous (no other rufous on wings); inner webs of rectrices broadly, sometimes entirely, rufous, none on outer webs (except in young). Above olivaceous, varying from a greenish to an ashy cast, the pileum more brownish. Wing-coverts (both rows) broadly tipped with brownish ashy-whitish; tertials, secondaries, and lateral tail-feather broadly edged on outer web with the same. Head laterally and beneath ashy paler on the throat and jugulum; rest of lower parts delicate yellow, varying from a rich lemon to a pale sulphur tint. Hab. Continental America.
Bill dark brown (never black). Upper parts decidedly greenish; ash of throat and jugulum, and yellow of abdomen, etc., very deep.
Inner webs of rectrices wholly rufous, or with only a narrow strip of dusky along the shaft. Wing, 3.75-4.25; tail, 3.75-4.20; culmen, .95-1.00; tarsus, .85-.90. Hab. Eastern Province of North America; in winter south through Eastern Mexico to Guatemala (grading into var. irritabilis in Nicaragua) … var. crinitus.
Bill deep black; upper parts without a greenish, but, instead, an ashy-brownish cast; ash of throat and jugulum, and yellow of abdomen, etc., very pale.
Inner webs of rectrices broadly (but not entirely) rufous to the extreme tip, with a broad dusky stripe next the shaft.
Wing, 4.10-4.50; tail, 4.00-4.70; culmen, 1.10-1.20; tarsus, 1.00-1.05. Hab. Southern and Western Mexico (Tehuantepec, Yucatan, Mazatlan, etc.) … var. cooperi.[69]
Wing, 3.60-3.90; tail, 3.50-3.75; culmen, .90-1.00; tarsus, .80-.85. Hab. Eastern South America, and Central America, from Paraguay to Costa Rica (grading into var. cooperi in Guatemala, and into var. cinerascens in Tehuantepec) … var. irritabilis.[70]
Inner webs of rectrices almost entirely rufous to near the extreme tip, the end of the web, however, being brownish-dusky like the outer.
Wing, 3.35-4.10; tail, 3.35-4.10; culmen, .80-1.00; tarsus, .80-.91. Hab. Western Province of United States, and Western Mexico (grading into var. irritabilis in Tehuantepec, and in winter migrating into Eastern Mexico) … var. cinerascens.
4. M. stolidus. Colors essentially nearly as the varieties of M. crinitus. Primaries more or less distinctly edged with rufous, especially on inner quills; rectrices with inner webs more or less edged with rufous (found only terminally in var. antillarum). Wing-coverts broadly tipped with dull ashy-whitish. Above brownish-slaty, with an olivaceous cast, the pileum more or less appreciably darker. Beneath ashy-white, without distinct yellow (except in var. stolidus, in which the abdomen, etc., are pale sulphury yellow). Tail varying in shape from slightly rounded to distinctly emarginated. Hab. West Indies.