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REVIEW OF AMERICAN BIRDS. 



[part I. 



(No. 16,1(58.) Fresh specimen : Total length, 8.10 ; expanse of wing, 13.20 ; 

 wing from carpal joint, 4.50. Prepared specimen : Total length, 8.00 ; wing, 

 4.40 ; tail, 4.40, depth of fork, .42 ; ditference between 10th and longest pri- 

 inarj, 1.22 ; exposed portion of let primary, 1.00, of 2d, 3.00, of longest, 4tli 

 (measured from exposed base of 1st primary), 3.45 ; length of bill from fore- 

 head, .GO, from nostril, .30, along gape, .71 ; tarsus, .80 ; middlo toe and claw, 

 .80, claw alone, .24 ; hind toe and claw, .50, claw alone, .26. 



On tho chin and crisaura the tips of feathers arc much lighter 

 than tho ashy bases, producing a mixture of the two colors, although 

 this is scarcely appreciable in some specimens. There is a very 

 faint indication occasionally of a dusky line on each side of the chin, 

 as in M. obscurus. 



Young birds have a large triangular pale ochraceous light spot on 

 the end of each feather (rather paler below), bounded externally by a 

 narrow border of blackish ; the quill- and tail-feathers as in the adult. 



The more important localities of specimens before me are as 

 follows : — 



Sex 

 and 



Age. 



Locality. 



Columbia River. 

 j Fort Steilacoom. 

 j Fort Crook, Cal. 

 i Kooteuay River. 

 I Flathead River. 

 I Pumpkin Bulle. 



Fort BridKPr, Utah. 



Hellgate, Id. 



Laramie Peak. 



2uni. 



When 

 Collected. 



AiiR. 1860. 

 Sept. 8, '60. 

 Oct. 22. 

 May 6. 



1860. 



1864. 



Received from 



S. F Balrd. 

 Dr G. Suckley. 

 Juo. Felln "r. 

 A. Campbell. 



Capt. Raynoldg. 

 C. Drexler. 

 Lt. Miillan. 

 Dr. Hitz. 

 Lt. Whipple. 



Collected' 



J. K. Townsend. 



Dr. Kennerly. 

 Dr. Hayden. f« 

 Jno. Pearsall. 

 Dr. Kennerlv. 



(2,922 ) Tvpe of specie*. , , 



IMyiadestes obscurus. .{ 



,_.. My'aulestea obnciirus, Lafr. Rev. Zool. 1839, 98 (Mexico). — Sclateb, 



,,*i; P. Z. S. 1856, 300 (Guatemala); 1857, 5, 213 (Orizaba); 1859, 



364 (Jalapa) ; 376 (Oaxaca ; eggs).— Ib. Catal. 1861, 47, no. 288.— 



BoN. Consp. 336. — Sclateb & Salvin, Ibis, 1, 1859, 14 (Guatemala). 



Hab. Mountainous regions of Mexico, into Guatemala ; Tres Marias Islands. 



(No. 37,500.) Wing about equal to tail, which is emarginate and rounded. 

 Fourth quill longest ; 5th and 3d a little shorter ; 2d longer than 7th ; let two- 

 fifths the 2d. 



Back olivaceous-rufous, more olive on rump and upper tail coverts : the 

 outer surface of wings, including edges of quills, more rufous cinnamon. A 

 pale cinnamon concealed patch at base of inner webs of quills, abruptly de- 

 fined on the secondaries, fading out gradually in the primaries along their 

 inner edges. Head, neck, and under parts plumbebus-ash (the latter less 

 pure). Chin (fadi out gradually into the ash of throat), sides of lower 

 mandibles (separated from chin by a black line), and line from nostril to 

 above eye, with middle of belly, dull white; eyelids pure white, the loral 

 region dusky, the cheeks below the eye blackish. Tail black, excepting 



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