28 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



CATHARUS FRANTZII FRANTZII Cabanis. 

 FRANTZIUS' NIGHTINGALE THRUSH. 



Adults (sexes alike). — Pileum and hindneck uniform deep russet 

 (varying from nearly mars brown to almost raw-umber) ; rest of 

 upper parts ])lain olive-brown or raw-umber, usually somewhat duller 

 or warmer brown on upper tail-coverts, tail, and remiges; sides of 

 head lighter, more grayish olive, gradually fading into dull white or 

 grayish w hite on throat ; rest of under parts pale gra^^, more or less 

 strongly tinged with olive on chest, sides, and flanks (especially on 

 the last, which are sometimes decidedly olivaceous), the abdomen, 

 anal region, and under tail-coverts white; maxilla black or dusky 

 brown ; mandible yellowish (pale salmon-color in life) ; inside of 

 mouth intense yellow-orange; iris dark brown; legs and feet light 

 horn color (in dried skins), pale grayish brown in life. 



Immature. — Above bright mummy brown, the back almost concolor 

 with the pileum; chest light mummy brown or mars brown; rest of 

 under parts mostly as in adults, but the few feathers of the first 

 plumage remaining on breast are white tipped with brown. 



Adult ?n.a?g.— Length (skins), 150.5-168 (165.5); wmg, 79.5-89 

 (87.2); tail, 62.5-72.5 (68.7); exposed culmen, 14-16.5 (15.4); tarsus, 

 33-36 (34.3); middle toe, 18.5-20.5 (19.2) .« 



Adult female. — Length (skins), 152.5-177 (163); wing, 78-87.5 

 (83.4); tail, 66-73 (68.7); exposed culmen, 14-16 (14.7); tarsus, 

 33-34 (33.7); middle toe, 17-20 (18.5).^ 



Highlands of Costa Rica (Volcan de Irazu; Volcan de Turrialba; 

 La Estrella de Cartago; San Jose; La Palma de San Jose; Rancho 

 Redondo; Rancho de Rio Jimenez; Navarro; Potrero Cerrado), and 

 Panama (Boquete ; Volcan de Chiriqui) . 



Catharus frantzii Cabanis, Journ. fur Orn., viii, Sept., 1860 (published Jan., 

 1861), 323 (Volcan de Irazu, Costa Rica; coll. Berlin Mus.). — Baird, Review 

 Am. Birds, 1864, 9 (Costa Rica).— Salvin, Proc. Zool. Soc. Lond., 1866, 69, 

 part (Costa Rica). — Lawrence, Ann. Lye. N. Y., ix, 1868, 90 (Rancho 

 Redondo and San Jose, Costa Rica). — Frantzius, Journ. fiir Orn., 1869, 289 

 (Volcan de Irazu, Potrero Cerrado, and La Palma, Costa Rica). — Boucard, 

 Proc. Zool. Soc. Lond., 1878, 50 (Navarro, Costa Rica). — Salvin and God- 

 man, Biol. Centr.-Am., Aves, i, 1879, 4. — Seebohm, Cat. Birds Brit. Mus., 

 V, 1881, 290.— RiDG WAY, Proc. U. S. Nat. Mus., v, 1883, 494 (Volcan de Irazti, 

 Costa Rica).— Zeledon, Proc. U. S. Nat. Mus., viii, 1885, 104 (Costa Rica).— 

 Bangs, Proc. New Engl. Zool. Club, iii, 1902, 50 (Boquete and Volcan de 

 Chiriqui, Chiriqui, 5,000 to 7,000 ft.). 



[Catharus] frantzii Sclater and Salvin, Nom. Av. Neotr., 1873, 1, part (Costa 

 Rica).— Sharpe, Hand -list, iv, 1903, 181. 



[Turdus] frantzii Gray, Hand-list, i, 1869, 259, no. 3779. 



o Twelve specimens. b Six specimens. 



