24 REVIEW OF AMERICAN BIRDS. [PART I. 
Turdus leucauchen. 
Turdus leucauchen, Scuater, P. Z. 8, 1858,°447.—Scxiarer, Ibis, 1859, 
6.—Is. Catal. Am. Birds, 1861, 3, no. 16. 
Hab. Guatemala. Mexico? 
Description of No. 30,647. (Compared with type.) Above black- 
ish ash, with tinge of olivaceous; wings and tail blackish brown, 
almost black. Beneath pale brownish ash; axillars and under wing 
coverts tinged with yellowish ; flanks rather darker ; middle of abdo- 
men and crissum white. Inner edges of the quills towards base not 
lighter than elsewhere, but brown. Chin and upper throat white, 
the feathers streaked centrally with black ; a conspicuous pure white 
patch at lower end of throat. Legs horn color; bill yellowish, 
tinged with brown along culmen towards the tip. 
Length, 9.25 (skin); wings, 4.80; tail, 4.20; bill, from nostril, .50; 
tarsus, 1.16; middle toe and claw, 1.10; longest primary (4th and 
5th), 1.10, longer than the shortest; 2d intermediate between 6th 
and 7th. 
Specimens from Costa Rica, compared with 30,647, are smaller; 
the back more olivaceous ; the median line of the belly whiter; the 
crissal feathers longer and more edged with plumbeous; the bill 
more tinged with brown. A triangular yellowish spot in the larger 
coverts apparently indicates a slight immaturity. 
Smith-|Collec-| Sex 
sonian| tor’s | and Locality. C be ee Received from Collected by 
No. No. | Age. Oe rece 
22,360 |43,465 | .. ‘* Mexico.”’ en Bm. Verresux, [| ~ “cutest 
32.684 |43,468 | @ ce ape 2 
20;588 | 1,452) .. Choctun, Vera Paz, | Jan. 1360. O. Salvin. 
30,647 | 3,011 | .. “  [Guat. “ “ 
Chulbites Guatemala. Cab. of G. N. Law- 
33,263 Z| sh Dota Mts., Costa Jan, 27, ’64. J. Carniol. [rence. 
33,264 23 | of if [Rica. ss Be 
30.647. ‘‘Compared with type.’’ 33,263. Length, 9; extent, 13. Iris yellowish-brown. 
33,264. Iris brown. 
Turdus assimilis. 
Turdus assimilis, Cas. Mus. Hein. 1850, 4.—Scriarer, P. Z. 8. 1857, 202 ; 
1859, 370 (eggs).—Is. Catal. Am. Birds, 1861, 3, no. 15. 
fab. Mexico (Vera Cruz, Orizaba, Oaxaca). Guatemala. 
No. 22,351. Upper parts uniformly yellowish-olive, very much 
as in the brighter varieties of Turdus swainsonti. Wing and tail 
feathers (concealed portions) brown, of similar shade, without the 
