BIRDS OF NORTH AND MIDDLE AMERICA. 213 



KEY TO THE SPECIES AND SUBSPECIES OF AUTOMOLUS. 



a. Throal and upper chest strongly rufescent (tawny to chestnut); no trace of supra- 

 auricuk\r 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 veraepacU.) 



f. Pileum and hindneck dark Vandyke brown or seal brown, back deep 



Vandyke brown, throat and upper chest rufous-tawny. (Central 



Guatemala.) Automolus veraepacis veraepacis (p. 214 ). 



ff. Pileum and hindneck light Vandyke or deep russet ))n)wn, back deep 

 tawny-brown, tlu'oat and upper chest tawny-()chrace<ius. (^^'estern 



Guatemala.) Automolus veraepacis umbrinus (p. 215). 



dd. Pileum and hindneck tawny-ljrown or russet-ljrown, concolor with Ijack. 



(Southwestern Mexico.) Automolus guerrerensis (p. 216). 



cc. Tail dark chestnut (otherwise very much like A. guerrerensis). (Santa Marta 



district of Colombia.) Automolus rufipectus fextralimitaD.« 



66. Wings deep sooty brown, concohir with liack. (Western Panama.) 



Automolus fumosus (p. 216). 

 aa. Throat buff, chest buffy or light l)uffy grayish; a more or less distinct supra- 

 auricular streak of buffy. 

 6. 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 al)o\e, 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). & 

 cc. Coloration less rufescent (more olivaceous) above, darker and uKire olivaceous 

 below, the l)uff of throat abruptly contrasted with the buffy olive of chest, 

 etc. (Eastern Costa Rica; western Panama?) 



Automolus cervinigularis hypophaeus (p. 219). 



66. Supra-auricular streak indistinct; under wing-coverts ochraceous-l)uff; 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 Panama; Colombia?; Ecuador?) 



Automolus pallidigularis pallidigularis i\). 220). 



cc. Coloration slightly paler above (back lighter and more olivaceous brown); 



chest uniform pale buffy grayish brown. (Western Panama and western 



Costa Rica.) 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 0. Bangs); xiii, 1899, 99 (Santa Marta, 

 3,000-7,500 ft.). 



b This probably requires subdivision within the geograjihic area indicatedo 



