BIRDS OF NORTH AND MIDDLE AMERICA, 213 
KEY TO THE SPECIES AND SUBSPECIES OF AUTOMOLUS. 
a. Throat and upper chest strongly rufescent (tawny to chestnut); no trace of supra- 
auricular streak. 
b. Wings deep russet or chestnut-brown, more rufescent than back. 
c. Tail clear chestnut or rufous-chestnut. 
d. Pileum and hindneck decidedly darker and more chestnut brown than back. 
e. Throat and upper chest deep cinnamon-rufous or rufous-chestnut (whole 
of under parts darker). (Southeastern Mexico.) 
Automolus rubiginosus (p. 214). 
ee. Throat and upper chest tawny-ochraceous to rufous-tawny (whole of 
under parts lighter). (Automolus verxpacis.) 
f. Pileum and hindneck dark vandyke brown or seal brown, back deep 
vandyke brown, throat and upper chest rufous-tawny. (Central 
Guatemala.)............---- Automolus verzpacis verzepacis (p. 214). 
ff. Pileum and hindneck light vandyke or deep russet brown, back deep 
tawny-brown, throat and upper chest tawny-ochraceous. (Western 
Guatemala.).........------ Automolus vereepacis umbrinus (p. 215). 
dd. Pileum and hindneck tawny-brown or russet-brown, concolor with back. 
(Southwestern Mexico.)....-..-..--.--- Automolus guerrerensis (p. 216). 
cc. Tail dark chestnut (otherwise very much like A. guerrerensis). (Santa Marta 
district of Colombia.)...-...---.----- Automolus rufipectus (extralimital).¢ 
bb. Wings deep sooty brown, concolor with back. (Western Panama.) 
Automolus fumosus (p. 216). 
aa. Throat buff, chest buffy or light buffy grayish; a more or less distinct supra- 
auricular streak of buffy. 
b. Supra-auricular streak distinct; feathers of upper chest more or less distinctly 
margined with darker; under wing-coverts tawny-ochraceous; under tail- 
coverts more or less strongly rufescent. (Automolus cervinigularis.) 
c. Coloration more rufescent above, darker and more buffy below, the buff of 
throat merging gradually into the dull brownish buff or clay color of chest, 
etc. (Southeastern Mexico to eastern Nicaragua.) 
Automolus cervinigularis cervinigularis (p. 217).0 
cc. Coloration less rufescent (more olivaceous) above, darker and more olivaceous 
below, the buff of throat abruptly contrasted with the buffy olive of chest, 
etc. (Eastern Costa Rica; western Panamé?) 
Automolus cervinigularis hypophzus (p. 219). 
bb. Supra-auricular streak indistinct; under wing-coverts ochraceous-buff; feathers 
of chest without darker margin; under tail-coverts slightly if at all rufescent. 
(Automolus pallidigularis.) 
c. Coloration slightly darker above (back deep olive-brown); chest indistinctly 
flammulated with pale buffy. (Eastern Panam4é; Colombia?; Ecuadér?) 
Automolus pallidigularis pallidigularis (p. 220). 
cc. Coloration slightly paler above (back lighter and more olivaceous brown); 
chest uniform pale buffy grayish brown. (Western Panamdé and western 
Costa: Rita: )sscscenus oss see Automolus pallidigularis exsertus (p. 221). 
« Automolus rufipectus Bangs, Proc. Biol. Soc. Wash., xii, Aug. 10, 1898, 158 (Puebla 
Vieja, Santa Marta, Colombia; coll. E. A. and O. Bangs); xiii, 1899, 99 (Santa Marta, 
3,000-7,500 ft.). 
b This probably requires subdivision within the geographic area indicated. 
