578 NORTH AMERICAN BIRDS. 



b^. Breast, etc., pale buff; exposed culmen usually more than .80, tarsus less 

 than 1.30. 



Adult: Above plain brownish gray, including head and neck; a dis- 

 tinct superciliary stripe of white ; no white at tips of outer tail- 

 feathers ; wing 5.10-5.20, tail 3.90-4.15, culmen .95-1.05, tarsus 

 1.20-1.25. Hab. Lower California (near Cape St. Lucas). 



762. M. confinis Baird. St. Lucas Robin. 



a^ Back, scapulars, and wing-coverts more or less brown or rusty, in contrast with 



grayer shade of hind-neck, rump, and quills. (Whole belly, anal region, 



and lower tail-coverts white, the latter with the plumbeous spots entirely 



concealed; no white about eye, and no white on outer tail-feathers.) 



6\ Sides, flanks, etc., ochraceous or ochraceous-rufous ; wing-coverts, scapulars, 



and back bright rusty brown, the hind-neck ash-gray or plumbeous, in 



marked contrast; wing 4.60-5.20, tail 3.85-4.50, culmen .85-1.00, tarsus 



1.25-1.32. Hab. Western and southern Mexico, north to Mazatlan. 



M. flavirostris SwAiis^s. Mazatlan Robin.i 



b^. Sides, flanks, etc., dull grayish fulvous ; wing-coverts and scapulars light 



raw-umber brown, the back more grayish brown ; hind-neck scarcely 



different from back; wing 4.80-4.85, tail 3.90-4.00, culmen 1.02-1.05, 



tarsus 1.35. Hab. Tres Marias Islands, western Mexico. 



M. graysoni Kidgw. Tres Marias Robin.* 



Genus HESPEROCICHLA Baird. (Page 571, pi. CXXIII., fig. 3.) 



Species. 



Adult male : Above dark plumbeous, varied by a broad supra-auricular stripe, 

 two bands across wing (tips of greater and middle coverts), patch at base of pri- 

 maries, etc., of orange-rufous or ochraceous ; chin, throat, breast, and sides orange- 

 rufous or ochraceous ; a broad band of dark plumbeous or slaty across chest ; pos- 

 terior lower parts white, tinged more or less with ochraceous, the feathers dark 

 grayish beneath surface. Adult female : Much paler and duller than the male, the 

 upper parts and collar across chest grayish brown (more brown in winter). Young : 

 Similar to adult female, but collar much less distinct and more or less broken b)'' 

 ochraceous spotting; feathers of throat and breast indistinctly bordered with 

 dusky, and some of the feathers of upper parts with indistinct paler shaft-streaks. 

 Length 9.00-10.00, wing 4.90-5.20, tail about 3.60-3.80, culmen about 1.00, tarsus 

 1.30. West compact and bulky, in bushes or small trees. Eggs 1.11 X -82, pale 

 greenish blue, sparingly speckled with brown. Hab. Western North America, 

 chiefly near Pacific coast, from California (in winter) to Bering's Strait; breeding 

 chiefly north of United States ; east, casually, to New Jersey, Long Island, and 

 Massachusetts 763. H. naevia (Gmel.). Varied Thrush. 



^ Menda flavirostris S WAINS., Philos. Mag. n. s. i. 1827, 369. 



2 Merula flavirostris graysoni RiDGW., Proc. U. S. Nat. Mus. v. June 5, 1SS2, 12. 



