PJRDCEEDIXGS OF UNITED STATES NATIONAL MUSEUM. 479 



tliird not longer tb an the fiftb; second primary three and one-fourth 

 times the first, and shorter than the seventh; secondaries very long, 

 the distance from the tip of the longest of the greater wing-poverts to 

 the tip of the longest secondary twice the distance from the latter 

 point to the tip of the longest primary; bill Thrush-like, attenuated 

 at the end; cidmen arched from the base; commissure rather straight, 

 with a distinct subtermiual notch, three times the length of the short 

 gonys ; chin-angle reaching considerably before the line of the nostrils, 

 the openings of which are large and oval, the overhanging membrane 

 being rather narrow; bristles along gape weak and short; tarsus mod- 

 erate, longer than middle toe and claw, and considerably longer than 

 one-fourth the longest tail-feather, but shorter than twice the exposed 

 culmen; tail fan-shaped, emargiuated, the feathers gradually becoming 

 longer from the middle pair outwards, the outer j^air decidedly the 

 longest; the outer web of the outermost tail-feathers broadens con- 

 spicuously toward the somewhat acuminate tip; longest tail-feathers 

 less tlian four times the commissure. 



Remarks. — Of this genus only the type species is as yet known, but 

 this bird is so peculiar as to show its difference from all other Thrushes 

 at once. The shortness of the gouys, and several other features, point 

 towards its position among the Plaiyeichlew, but the tail, with its 

 emarginate shape, is, so far as I am aware, unique among those birds 

 which can claim any relationship with it. 



Platycichla Baird. 



<^18b4.—" Mylocichla Scliiff," Bouap. Coll. Delattre, p. 30. (Type Ciehlopsis 



leiicoffenys, Cab.) 

 — 1864.— Platycichla Baird, Rev. Am. Birds, I, p. 3-2. (Type P. hrevipes.) 



Size moderate; color uniform; wing rounded, the third, fourth, and 

 fifth primaries being longest, the third about equal to the fifth; second 



PlatijcicJtla ''hrevqjes." 



primary not longer than three and a half times the first, and longer 

 than the seventh; secondaries moderate, the distance from the tip of 

 the longest of the greater wing-coverts to the tip of the longest second- 



