470 Field Museum of Natural History— Zoology, Vol. XIII. 



2 — Similar, but larger; wing about 82 V. callonolus 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' — 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» — Wing coverts nearly or quite immaculate, 

 c^ — Dusky bars on underparts narrower. 



I — Whitish bars narrower V. kirkii cecilii 



(Colombia and eastern Ecuador.) 



2 — Whitish bars broader V. kirkii dariensis. 



(Eastern Panama and western Ecuador.) 



fi^ — 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' — Sides of head paler than general coloration. 



1 — Wing about 100 V. oleaginus oleaginus. 



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

 b' — Sides of head not distinctly paler than general coloration. 



I — Coloration deeper; wing about 86 .... F. oleaginus sanguinolentus. 

 (Southern Vera Cruz, Mexico and southward to western 

 Panama.) 

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



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

 3 — Back and rump more golden; wing about 98 . . F. 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* — No yellow nuchal band. 



b^ — 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 buflfy 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^ — 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 specim^ens. 



