REVIEW OF AMERICAN BIRDS. 



[part I. 



question to be decided hereafter. Mr. Sclater evidently refers to 

 this intermediate form in P. Z. S. 1859, 310. 



Turdus grayi. 



? Merula tristis, Swains. Philos. Mag. 1827, 369. — Tardus tristis, Sclater, 



P. Z. S. 1856, 294; 1859, 330. 

 2\rdus grayi, Bon. P. Z. S. 1837, 118.— Ib. Conspectus, 1850, 272.— 



Sclater & Salvin, Ibis, I, 1859, 5 (eggs). — Sclater, Catal. 1861,4, 



no. 22.— Cabanis, Journ. for 1860, 323. 

 ? Planesticus luridus, Bon. Comptes Rendas, XXXVIII, 1854, 4 (New 



Grenada). 

 Turdus casius, Bon. Comptes Rendu?, XLI, 1855, 657. — Turdus cxsius, 



Sclater, P. Z. S. 1859, 330.— Lawr. Ann. N. Y. Ljc. 1861, 326 



(Panama). 



Hab. Mexico (Xalapa, Cordova, Oaxaca) ; Guatemala (Vera Paz) ; Costa 

 Rica. 



In a rather large series of specimens I find some differences in 

 individuals, which, however, do not appear of specific value, espe- 

 cially as the separation in one character does not correspond with that 

 based on another ; nor are there any appreciable geographical rela- 

 tionships. The length of the wing, tarsus, and bill, as well as the color 

 and width of the latter, vary in specimens from the same localities. 

 In some the inner edges of the quills towards their bases are of the 

 same light cinnamon as the inner coverts ; this color sometimes 

 sharply defined as a margin. In others, again, this is less distinct ; 

 while m some these edges are only of a paler gray, with the faintest 

 trace only of cinnamon, and no margin is traceable. 



In most specimens of this bird the edges of the inner webs of the 

 quills towards the base are light cinnamon, like the axillars, forming 

 a conspicuous and well defined edging. In Iso. 30,646, however 

 (a female bird), this character is almost inappreciable. 



No. 30,559, from Acajutla, differs in being larger (length, 10.00; 

 wing, 5.15 ; tail, 4.80 ; bill to nostril, .60 ; tarsus, 1.25). The colors 

 are paler, upper parts more olive, and the inner edges of the quills 



