BIRDS OF NOETH AND MIDDLE AMERICA. 115 



inner webs of reniiges becoming pale cinnamon or cinnamon-buff 

 basally; bill dusky brown or blackish; iris brown; legs and feet horn 

 brown (in dried skins); length (skins), 206-226 (215); wing, 117- 

 129.5 (123.2); tail, 84-96.5 (90.6); exposed culmen, 20-22 (21); tar- 

 sus, 30-31 (30.5); middle toe, 20.5-22.5 (21.5).« 



Adult female. — Very similar to the adult male and probably not 

 always distinguishable, but usually (?) with coloration very slightly 

 paler and duller; length (skin), 205; wing, 115; tail, 83.5; exposed 

 culmen, 19.5; tarsus, 29.5; middle toe, 21.^ 



Young. — Upper parts as in adults, but the brown duller and more 

 olivaceous, the feathers of back and pileum with indistinct and very 

 narrow shaft-lines of paler; wing-coverts tipped with a small triangu- 

 lar or wedge-shaped spot of ochraceous-buff ; chin and throat very 

 pale buffy grayish, indistinctly streaked with olive-brown; chest 

 olive-brown, indistinctly spotted with darker; breast pale dull buff, 

 fading into white on abdomen, the breast and upper abdomen 

 spotted with dark olive-brown; otherwise like adults. 



Highlands of Costa Rica (Cervantes; Orosi; Volcan de Poas; Gua- 

 piles; El Zarcero; Juiz) and Panama (Caribbean slope, A^olcan de 

 Chiriqui; Santa Fe de Veragua; Loma del Leon), and southward to 

 western Ecuador (Chimbo).'^ 



Turdus obsolelus Lawrence, Ann. Lye. Nat. Hist. N. Y., vii, Feb., 1862, 470 

 (Lion Hill, Panama R. R.; eoll. G. N. Lawrence); ix, 1868, 91, 145 (Cervan- 

 tes, Costa Rica; crit.). — Baird, Review Am. Birds, 1864, 28 (Panama). — 

 Salvin, Proc. Zool. Soc. Lond., 1867, 133 (Santa Fe, Veragua; crit.); 1870, 

 180 (Costa Rica; crit.); Ibis, 1869, 312 (crit.). — Frantzius, Journ. fiir Orn., 

 1869, 290 (Orosi and Volcan de Poas, Costa Rica). — Boucard, Proc. Zool. Soc. 

 Lond., 1878, 50 (Naranjo, Costa Rica). — Salvin and Godman, Biol. Centr.- 

 Am., Aves, i, 1879, 19.— Seebohm, Cat. Birds Brit. Mus., v, 1881, 218.— Ber- 

 LEPSCH and Taczanowski, Proc. Zool. Soc. Lond., 1883, 539 (Chimbo, w. 

 Ecuador; crit.). 



[Turdus] obsoletus Sclater and Salvin, Nom. A v. Neotr., 1873, 1. 



Merula obsoleta Bangs, Proc. New Engl. Zool. Club, iii, 1902, 49 (Volcan de Chi- 

 riqui, 4500 ft.). 



[Merula] obsoleta Sharpe, Hand-list, iv, 1903, 124. 



PLANESTICUS NIGRIROSTRIS (Lawrence). 

 BLACK-BILLED THRUSH. 



Very similar to P. obsoletus, but with larger bill and feet, shorter 

 wing and tail, and slightly paler coloration. 



Adults {sexes alike). — Above plain olive-brown (between bistre and 

 raw-umber) ; chin and throat pale brownish buff or brownish white, 

 streaked with olive or olive-brown; chest, breast, sides, and flanks 

 plain wood brown or isabella color (the feathers sometimes with very 



o Five specimens. 



b One specimen. 



c According to Berlepsch and Taczanowski. 



