TURDUS. 573 
4.00-4.10, tail about 4.00, exposed culmen .45-.50, tarsus .80-.85. 
Hab. Highlands of Guatemala and eastern Mexico. 
M. obscurus Lark, Mexican Solitaire.! 
c. Head and breast ash-gray, this color invading the back; throat and 
forehead distinctly whitish, 
@, Middle tail-feathers without trace of whitish tips; wing 4.15- 
4.35, tail 4.30, exposed culmen .45-.47, tarsus .80-.82. Hab. 
Central and western Mexico, north to Mazatlan. 
M. obscurus occidentalis Strgn. Mazatlan Solitaire.? 
d@, Six middle tail-feathers minutely tipped with white; wing 3.90- 
4.05, tail 3.90-4.20, exposed culmen .45, tarsus .90. Hab. Tres 
Marias Islands, western Mexico. 
M. obscurus insularis Strgn. Tres Marias Solitaire.® 
6%. Lower parts similar in color to the upper, though slightly paler; no dusky 
streak on side of throat. 
Adult: Uniform slate-color, paler beneath, the lores and a broad bar 
across basal portion of secondaries black; eyelids white; wing 
about 3.90-4.00, tail 3.70-3.90, exposed culmen .40, tarsus .80-.85. 
Hab. Highlands of Guatemala and southern Mexico. 
M. unicolor Sct. Slate-colored Solitaire.‘ 
Genus TURDUS Linnavs. (Page 571, pl. CXXIIL., figs. 1, 4.) 
Species. 
a’, Wing never longer than three and a half times the length of the tarsus. Adults 
plain brown above, usually uniform, but sometimes more rufescent on tail 
and upper tail-coverts; beneath whitish (sometimes buffy anteriorly), the 
chest, etc., spotted with brown or blackish. Young essentially like adults, 
but with top of head, back, ete, more or less streaked with dull whitish, 
pale buffy, or pale rusty, the middle and greater wing-coverts tipped with 
the same, and (except in 7. mustelinus) spots of lower parts more transverse, 
and extending backward over flanks, etc. (Subgenus Hylocichla Barrp.) 
b.. Sides distinctly spotted, as well as the breast; exposed culmen .62, or 
more. 
Adult: Above tawny olive, brighter or more cinnamon on top of head, 
more olive on tail; beneath, including sides, white, the breast and 
sides marked with roundish or obcordate spots of black or dusky ; 
length 7.50-8.25, wing 4.10-4.50, tail 3.00-3.30, exposed culmen .62~ 
.75, tarsus 1.20-1.30. Vest usually saddled upon horizontal branch 
of a small tree, in damp woods, very compact, composed partly of 
1 Myiadestes obscurus LaFR., Rev. Zool. 1839, 98. 
2 Myadeetes obscurus var. occidentalis Stusn., Proc. U. S. Nat. Mus. iv. Apr. 6, 1882, 371, 372. 
8 Myadestes obscurus var. insularie Stzsn., Proc. U. 8. Nat. Mus. iv. Apr. 6, 1882, 371, 373. 
4 Myiadestes unicolor Scu., P. Z. S. 1856, 299. 
