BIRDS — FEIXGILLIDAE — PIPILO. 511 



A. First primary nearly equal to the secondaries. Tail moderately graduated, outer feather 

 about a quarter of an inch shortest. Above, with head and neck, black ; middle of belly white ; 

 sides chestnut brown. Tail feathers with white patches. 



Hind claw scarcely longer than its digit, the toe and claw as long as the middle toe 

 without its claw. Inner lateral claw reaching the base of the middle one. Middle toe 

 and claw as long as the tarsus. 



White of tail occupying nearly the terminal half. Outer web of exterior tail 

 feather almost entirely white, a black streak usually at the end. No white on 

 the wing coverts and scapulars. Outer primaries edged with white through- 

 out, this sometimes interrupted in the middle P. erythrophthalmus. 



Wing coverts with rounded, and scapulars with elongated oval spots of white on 

 the tip of outer webs of the feathers, the white rarely extending to the edge of 

 the feather. Outer web of exterior tail feather entirely black ; the terminal 

 white inner spot short. Primaries without white edges towards the base. 



Throat feathers without concealed white spot P. oregonus. 



Hind claw a little longer than its digit ; the toe and claw together a very little longer 

 than the middle toe without it. Inner lateral toe and claw reaching a very little be- 

 yond the base of the middle claw. Middle toe and claw a little longer than the tarsus. 

 Wing coverts and scapulars with spots at the ends of outer webs extending to the 

 tip, and without black border on the edge. Outer web of external tail feather 

 white, this entirely confluent with the extended terminal spot. Outer primaries 

 broadly edged with white throughout. Throat feathers with concealed white 



spots P. arcticus. 



Hind claw much larger than its digit ; hind toe and claw reaching nearly as far as the 

 middle of its middle claw ; the inner lateral claw reaching nearly as far ; the middle 

 toe and claw longer than the tarsus. 



Wing coverts and scapulars with large sub-rounded and elliptical white spots. 

 Scapular spots with a narrow edging of black externally ; the covert spots 

 generally white to the edge, but not extending to the extreme end of the outer 

 web. Primaries edged externally with white towards the end. Throat feathers 

 with concealed white spots P. megalonyx. 



B. Tail more graduated ; outer feather half an inch shortest. First primary mostly less 

 than the secondaries. Above light brown; beneath similar but lighter. No white on wino-s or 

 tail. 



Hood tinged with chestnut. Middle of belly white ; a dusky spot on the middle 

 of the breast. Chin and throat lighter, encircled by spots P. mesoleucus. 



Hood almost like the back. Beneath uniform light brown, without the spot. 

 Chin and throat much as in the last P.fuscus. 



Nearly uniform yellowish brown, paler beneath. Lores and chin dusky. P. aberii. 



C. Tail intermediate. First quill longer than the secondaries. Upper parts^ with wings and 

 tail olive green. 



Hood chestnut. Chin and throat abruptly white, surrounded by dark ash. 



P. cldorurus. 



I do not venture to give names to sections B and C in my ignorance of the numerous allied 



genera of South America and Mexico. Bonaparte makes a genus, Kieneria, (Comptes RendusJ 



