890 BULLETIN 50, UKITED STATES NATIONAL MUSEUM. 



than mandibular rami, the interramal space much narrower and 

 rounded anteriorly; maxillary toinium straight or slightly sinuated, 

 distinctly notched subterminally. Nostril oval, nearly horizontal, in 

 anterior end of nasal fossas, margined above by narrow membrane 

 gradually widening posteriorly. Rictal bristles strongly developed, 

 and feathers of chin and frontal antiae with distinct bristly tips, those 

 of the latter extending at least halfway between nostril and tip of 

 maxilla, sometimes nearly to tip. Wmg moderate, much rounded, 

 with longest primaries exceeding secondaries by about length of 

 exposed culmen; seventh, sixth, seventh and eighth, or seventh, 

 eighth and ninth primaries longest, the tenth (outermost) shorter 

 than fifth, sometimes slightly shorter than first; outer web of outer- 

 most primary normal. Tail about as long as distance from bend of 

 wing to end of secondaries, even or slightly rounded, the rectrices 

 narrow but increasing in width terminally. Tarsus much less than 

 one-third but more than one-fourth as long as wing, its scutellation 

 typically exaspidean; middle toe, without claw, decidedly more than 

 half as long as tarsus, its basal phalanx wholly united to outer toe, the 

 second phalanx also adherent for greater part to inner toe, except in 

 P. sulphurescens,"' in which it is united for only about half its length; 

 outer toe, without claw, reaching to or beyond middle of subterminal 

 phalanx of middle toe, the inner toe distinctly shorter; hallux al:)Out 

 as long as inner toe but stouter, its claw shorter than the digit; all the 

 claws moderately curved, sharp, much compressed. 



Coloration. — Above plain olive-green, duller, sometimes grayish, on 

 pileum, the wings dusky with yellowish edgings, the middle and 

 greater coverts tipped with olive-yellow or yellowish olive; beneath 

 light 3^ellow or olive-yellow, tinged with olive on chest and sides, the 

 throat sometimes grayish. In P. fiamventris the upper parts light 

 yellowish olive-green, supraloral region and upper eyelid saffron yel- 

 low, under parts gamboge yellow, paler posteriorly. 



Nidification. — Nest (of R. cinereiceps) "a, pendulous inverted 

 pouch, suspended from a single twig, composed almost entirely of 

 slender black filaments resembling horse-hairs . . . so loosely Inult 

 as to be easily seen through when held up to the light ; ' ' the entrance 

 "at the extreme lower end, the nest proper being a sort of pocket on 

 one side, about 2 inches above the entrance." Eggs, flesh colored, 

 with a ring around larger end of violet and reddish brown spots.^ 



Range. — Southern Mexico to Peru, Bolivia, and Paraguay. (About 

 ten species.) 



a P . Jlavo-olivaceus Lawrence, which Doctor Sclater synonymizes with P. sulphur- 

 escens differs conspicuously in respect to extent of cohesion of the anterior toes, the 

 second phalanx of the middle toe being united to the outer toe for its entire length. It 

 is also sufficiently distinct in coloration. 



&Nelirkorn, Journ. fiir Orn., 1879, 356. 



