470 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. XIII. 



2 Similar, but larger; wing about 82 V. callonotus major. 



(Northern Peru.) 

 3 Underparts smoky blackish, narrowly barred with whitish; wing 



about 78 V. sanguineus. 



(Guiana and eastern Venezuela.) 

 b Back not red. 



b 1 Wing coverts with small spots or streaks. 



I Wing about 89 V. kirkii kirkii. 



(Tobago and Trinidad.) 



2 Smaller; wing about 82 V. kirkii continentalis. 



(Venezuela.) 



c 1 Wing coverts nearly or quite immaculate. 

 c* Dusky bars on underparts narrower. 



i Whitish bars narrower V. kirkii cecilit 



(Colombia and eastern Ecuador.) 



2 Whitish bars broader V. kirkii dariensis. 



(Eastern Panama and western Ecuador.) 



d l Dusky bars on underparts broader V. kirkii neglectus. 



(Southwestern Costa Rica to western Panama) 

 B Rump and upper tail coverts not red. 



a Underparts uniform (not barred or spotted). 

 a 1 Sides of head paler than general coloration. 



I Wing about 100 V. oleaginus oleaginus. 



(Highlands of eastern Mexico, San Luis Potosi to Vera Cruz.) 

 b 1 Sides of head not distinctly paler than general coloration. 



I Coloration deeper; wing about 86 .... V. oleaginus sanguinolentus. 

 (Southern Vera Cruz, Mexico and southward to western 

 Panama.) 

 2 Coloration duller ; size larger ; wing about 97 . V. oleaginus fumigatus. 



(Eastern Colombia; Ecuador; Peru; Bolivia and Argentina.) 

 3 Back and rump more golden; wing about 98 . . V. oleaginus aureus. 

 (Colombia and northern Ecuador; northeastern Colombia?) 



4 Smaller; wing about 91 V. oleaginus reichenbachi. 



(Venezuela.) 



b More or less of underparts conspicuously barred or spotted. 

 b 1 No yellow nuchal band. 



b 2 Wing coverts plain, without spots. 



I Back golden olive, with ends of feathers dull red, forming ob- 

 scurely defined red spots; olive bars on underparts decidedly 



wider than buffy bars; top of head in female deep black 



V. nigriceps nigriceps. 



(Bolivia and Peru.) 

 2 Bars on underparts of about equal width . V. nigriceps equifasciatus. 



(Colombia and northern Ecuador.) 

 3 Bars on underparts irregular; wing shorter; top of head in female 



olive V. nigriceps pectoralis* 



(Central Peru.) 

 c 1 More or less of wing coverts marked with spots or streaks of yellow 



or white. 

 The status of this form is uncertain. I have seen no specimens. 



