TURDUS. 573 



4.00-4.10, tail about 4.00, exposed culmen .45-.50, tarsus .80-.85. 

 Jffab. Highlands of Guatemala and eastern Mexico. 



M. obscurus Lafr. Mexican Solitaire. 1 



c 2 . Head and breast ash-gray, this color invading the back ; throat and 



forehead distinctly whitish. 



d 1 . 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 Stejn. Mazatlan Solitaire. 2 

 d 3 . 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 Stejn. Tres Marias Solitaire. 3 

 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. 

 Sab. Highlands of Guatemala and southern Mexico. 



M. unicolor Scl. Slate-colored Solitaire. 4 



Genus TURDUS Linnjeijs. (Page 571, pi. CXXIIL, figs. 1, 4.) 



Species. 



a 1 . "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, etc., 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 T. mustelinus') spots of lower parts more transverse, 

 and extending backward over flanks, etc. (Subgenus Hylocichla Baird.) 

 ¥. 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. Nest 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 Myadestes obscurus var. occidentalis Stejn., Proo. U. S. Nat. Mas. iv. Apr. 6, 1882, 371, 372. 



3 Myadestes obscurus var. insularis Stejn., Proo. U. S. Nat. Mus. iv. Apr. 6, 1882, 371, 373. 

 * Myiadestes unicolor Set., P. Z. S. 1856, 299. 



