BIRDS OF XOETH AND MIDDLE AMERICA. , 111 



Pacific slope of Central America, from southeastern, Oaxaca (wSanto 

 Domingo, breedine;), through western Guatemala to Costa Rica (Bar- 

 ranca; Dota; Santa Maria; Navarro) and Panama (Boquete; Divala). 



Menda leucauchen (not Turdus leucauchen Sclater) Nelson, Auk, xv, April, 1898, 



161, part (near Santo Domingo, Oaxaca). — Bangs, Auk, xviii, 1901, 368 



(Divala, Chiriqui). 

 Turdus leucauchen (not of Sclater) Baird, Review Am. Birds, 1864, 24, part (^Dota 



Mts., Costa Rica). — Lawrence, Ann. Lye. N. Y., ix, 1868, 91 (Navarro and 



Dota, Costa Rica). 

 (?) T[urdus\ leucauchen Sharpe, Bull. Brit. Orn. Clul), no. 1, 1898, p. xxvi (crit.); 



Ibis, 1898, 289 (do). 

 {l)Turdus tnstis (not Merula tiistis Swainson) Salvin, Ibis, 1870, 180 (Calovevora, 



Calobre, Boquete de Chitra, and Volcan de Chiriqui, Panama; crit.) — Under- 

 wood, Il>is, 1896, 432 (Volcan de Miravalles, Costa Rica). 

 Turdus tristis Salvin and Godman, Biol. Centr.-Am., Aves, i, 1879, 15, part 



(Dueiias, Guatemala; Dota Mts., and Navarro, Costa Rica).«— Seebohm, Cat. 



Birds Brit. Mus., v, 1881, 211, part (Nicaragua; Costa Rica). 

 [Turdus] tnstis Sclater and Salvin, Nom. Av. Neotr., 1873, 1, part. 

 (?) [Planesticus] tristis Heine and Reichenow, Nom. Mus. Hein., 1890, 3, part 



(■'Central America" ). 

 Ihirdus assiinilis (not of Cal^anis) Salvin, Ibis. 1860, 272 (Diienas, Guatemala). — 



Baird, Review Am. Birds, 1864, 24, part (Duefias). 

 Merula leucauchen dagnx (not Turdus dagux Berlepscli) Bangs, Proc. New Engl. 



Zool. Club, iii, Jan. 30, 1902, 49 (Boquete. Chiriqui, 4000 to 5000 ft.; crit.). 

 Merula leucauchen cnephosa Bangs, Proc. New Engl. Zool. Club, iii, Oct. 10, 



1902, 92 (Boquete, Chiriqui, 4000 ft.; coll. E. A. and O. Bangs). 

 [Merula] cuephosa (typographical error) Siiarpe, Hand-list, iv, 1903, 123. 



PLANESTICUS TRISTIS LEUCAUCHEN (Sclater). 

 WHITE-THROATED THRUSH. 



Similar to P. t. cnephosa, but much darker and grayer, the upper 

 parts olivaceous slate color or dull slate, the chest, sides, and flanks 

 mouse gray or smoke gray to hair brown, the black streaks on 

 throat averaging broader, the white patch on lower throat more con- 

 spicuous from greater contrast with darker adjacent colors. Young 

 very much darker than that of P. t. tristis,^ with general color of upper 

 parts dark sooty brown or deep sepia, the under parts much more 

 heavily spotted with sooty. 



Adult male.— I jength (skins), 213-227 (222); wing, 117.5-127 

 (122.7); tail, 88-99 (95); exposed culmen, 20-21 (20.7); tarsus, 28.5- 

 29.5 (29); middle toe, 19.5-20.5 (20).^- 



a Without examination of specimens from the other localities cited in the ' ' Biologia " 

 I can not, of course, be sure as to their correct allocation. 

 b The young of P. t. assimils and P. t. cnephosa not seen. 

 c Four specimens, from Costa Rica. 



