BIRDS OP NORTH AND MIDDLE AMERICA 311 



cc. Abdomen spotted rather than barred (spots sometimes broadened so as to 

 approximate barrings) ? 

 d. Entire chin and upper throat streaked or heavily spotted with blackish 

 brown. 

 e. Upperparts dark grayish black, not brownish (coastal plains of southern 



Chiapas) Colinus virginianus salvini, ad. 2 (p. 341) 



ee. Upperparts definitely brownish. 



/. Feathers of upper back tawny to dark brown with numerous black 

 blotches as well as vermiculations. 

 g. General tone of upperparts rufescent-tawny (Pacific lowlands of 

 western Panama). 



Colinus cristatus panamensis, ad. 9 (p. 363) 



gg. General tone of upperparts bister (largely extralimital — the 



Guianas, Brazil, and Venezuela ; introduced in the Grenadines and 



Virgin Islands) Colinus cristatus sonnini, ad. 9 (p. 360) 



ff. Feathers of upper back grayish brown, with no black blotches but 

 only vermiculations. 

 g. Pale spots on abdomen definitely buffy (El Salvador, east of 

 Lempa River). 



Colinus leucopogon leucopogon, ad. 9 (p. 357) 

 gg. Pale spots on abdomen white, only slightly tinged with buffy. 

 h. Chin, throat, and superciliaries darker — ochraceous-buff to honey 

 yellow (western Nicaragua). 



Colinus leucopogon sclateri, ad. 9 (p. 355) 

 hh. Chin, throat, and superciliaries paler — light pinkish buff to pale 

 ochraceous-buff (vifestern Honduras). 



Colinus leucopogon leylandi, ad. 9 (p. 353) 

 dd. Entire chin and upper throat immaculate or only faintly spotted with 

 blackish brown, 

 e. Chin and upper throat with some blackish spots. 

 /. Chin and upper throat bordered laterally and posteriorly with a band 

 of tawny spotted with blackish. 

 g. Paler, general color of upperparts pale buckthorn brown with a 

 grayish tinge (western Guatemala). 



Colinus leucopogon incanus, ad. 9 (p. 359) 

 gg. Darker, general color of upperparts snuff brown with a grayish 

 tinge (El Salvador west of Lempa River). 



Colinus leucopogon hypoleucus, ad. 9 (p. 358) 

 ff. Chin and upper throat without a tawny, black-spotted border (plateau 

 and western slope of Costa Rica). 



Colinus leucopogon dickeyi, ad. 9 (p. 356) 

 ee. Chin and upper throat immaculate. 



/. Breast feathers avellaneous to wood brown, finely vermiculated with 

 blackish, forming a distinct pectoral band. 

 g. Throat generally pale, slightly washed with buffy; middle of 

 abdomen also slightly tinged with buffy (western Honduras). 



Colinus leucopogon leylandi, ad. 9 (p. 353) 

 gg. Throat generally darker, heavily suffused with ochraceous-buff; 

 middle of abdomen definitely buffy (western Nicaragua). 



Colinus leucopogon sclateri, ad. 9 (p. 355) 



" As in some specimens of Colinus leucopogon hypoleucus. 



