Page:Birds of North and Middle America partV Ridgway.djvu/134

106 :: cc. Abdomen slate color or gray.
 * d. Back with a large concealed patch of white; sexes nearly alike in color.
 * e. Throat uniform black. (Costa Rica and western Panama.)

Myrmeciza læmosticta, adult male (p. 109).
 * ee. Throat spotted or barred with white.

Myrmeciza læmosticta, adult female (p. 109).
 * dd. Back without a concealed white patch; sexes very different in color.
 * e. All the wing-coverts with a white apical spot or dot; tail relatively shorter.
 * f. Darker, the back, rump, etc., deep mummy or vandyke brown, head (all round) black, chest, breast, and abdomen blackish slate. (North-western Ecuador)

Myrmeciza maculifer, adult male (extralimital).
 * ff. Paler, the back, rump, etc., mars brown, head (all round) blackish slate, chest, breast, and abdomen slate-gray. (Eastern Panamá and adjacent portion of Colombia)

Myrmeciza cassini, adult male (p. 110).
 * ee. Wing-coverts (except, sometimes, a few of the more anterior lesser coverts) without white spots or dots. (Myrmeciza exsul.)
 * f. Slightly darker or duller in general coloration, with slate color of under parts usually not paler on abdomen. (Caribbean slope of Panamá, Costa Rica, and Nicaragua.)

Myrmeciza exsul exsul, adult male (p. 111).
 * ff. Slightly brighter in coloration, with slate color of under parts usually paler on abdomen. (Pacific slope of Costa Rica and western Panamá.)

Myrmeciza exsul occidentalis, adult male (p. 113).
 * bb. Back, wings, etc. (whole upper parts), also entire under parts, uniform black, the anterior lesser wing-coverts white.
 * c. Forehead and lores densely (normally) feathered; white area on anterior margin of wing narrower; tarsus 31.5-32. (Central Colombia.)

Myrmeciza immaculata, adult male (extralimital).
 * cc. Forehead and lores scantily feathered; white area on anterior margin of wing broader; tarsus 33.5-36.
 * d. White area on anterior portion of wing smaller, involving only marginal lesser coverts; tarsus 33.5-34.5. (Costa Rica and western Panamá.)

Myrmeciza zeledoni, adult male (p. 114).
 * dd. White area on anterior portion of wing much larger, involving nearly the whole of the lesser covert area; tarsus 36. (Western Ecuadór to central Colombia.)

Myrmeciza berlepsch, adult male (extralimital). aa. Under parts without any black.
 * bb. Throat and chest buff or ochraceous-buff (the former sometimes whitish); abdomen white. (Myrmeciza boucardi.)
 * c. Wing-coverts distinctly spotted or barred with black.
 * d. Spots or bars on wing-coverts larger, very conspicuous.

Myrmeciza boucardi griseipectus, adult female (extralimital).
 * dd. Spots or bars on wing-coverts smaller, inconspicuous.

Myrmeciza boucardi panamensis, adult female (p. 108).