186 BULLF.TTN oO^ UNITED STATES NATIONAL MUSEUM. 



Nidification. — (Unknown. ) 



Range. — Highlands of Mexico (alpine). (Monotypic.) 

 This exceedingly distinct genus, although formerly associated with 

 Turdus, is not at all nearly related to the latter, but is even farther 

 removed than Ixoreus and Cicliloselys; but although its very short 

 tarsi suggest relationship to Sialia, I do not think it is so nearly related 

 to the latter as to the two monotypic genera above mentioned, with 

 wliich it agrees in the conspicuous "pattern" on under side of the 

 reimges and other characters not shared by Sialia. 



RIDGWAYIA PINICOLA (Sclater). 

 AZTEC" THRUSH. 



Adult male. — General color of upper parts dark sooty brown 

 (between sepia and clove brown), the feathers of pileum, hindnebk, and 

 back, together with scapulars and smaller wing-coverts, with very 

 narrow shaft-streaks of very pale brown or 'brownish white, those of 

 the pileum, hindneck, and extreme upper back further varied by hav- 

 ing the inner webs (in part at least) darker, their outer webs paler than 

 the general color; longer and exterior upper tail-coverts white; tail 

 l)lack, the middle pair of rectrices tipped (more or less extensively) 

 with pale gray, this passing into white at extreme tip;'' remaining 

 rectrices more broadly tipped with white (or pale gray passing into 

 white terminally), the white more extensive on inner than on outer 

 web and increasing in extent toward the exterior rectrix, the outer 

 web of which is edged with white; outer webs of greater wing-coverts 

 mostly pale brownish buffy or dullbuffy white, the extreme basaL 

 portion (hidden by middle coverts) and terminal portion dusky 

 brown; secondaries (except two innermost) black, broadly tipped 

 with pale silvery gray, their outer webs edged w4th white, but tliis 

 wliite edging interrupted toward the gray tip; primaries black, 

 broadly tipped with pale silvery gray, extensively white basally (on 

 ])oth webs), the three longest with a white mark at sinuated portion of 

 outer web; alula uniform brownish black; primary coverts black, 

 very broadly tipped with silvery gray, the shafts black in the gray 

 portion; an indistinct superciliary stripe of pale brown; sides of head, 

 chin, throat, and chest deep sooty brown or sepia, the feathers with 

 narrow paler shaft-streaks and sometimes more or less paler at tip; 

 rest of under parts white, more or less tinged with buff, especially on 

 under tail-coverts: a sooty patch on flanks, the breast and sides 

 sometimes mottled or clouded with pale sooty; axillars and under 

 wing-coverts white; bill dusky bniwn; iris brown?; legs and feet 

 brownish or dull yellowish (in dried skins), the toes usually slightly 



" The specific term would suggest Pine Thrush as an appropriate vernacular name; 

 but Mr. Nelson informs me the species does not inhabit the pine belt. 

 b In some specimens the middle pair are black almost to the extremity. 



