470 



U. S p. R. K. EXP. AND SURVEYS — ZOOLOGY GENERAL REPORT. 



POOSPIZA BILINEATA, Sclcater. 



Black-throated Sparrow. 



Emberiza biUneala, Cassis-, Pr. A. N. Sr. Ph. V, Oct. 1850, 104, pi. iii, Texas.— In. Illust. I, v, 1854, 150 ; pi xxiii. 

 Poospiza bilineata, Sclater, Pr. Zool. Soc. 1857, 7. 

 Sp. Ch. — Above uniform unspotted ashy gray, tinged witli light brown ; purer and more plumbeous anteriorly. Under parte 

 white, tinned with plumbeous on tlie sides, and with yellowish brown about the thighs. A sharply- defined superciliary and 

 ma.'iillary stripe of pure white, the former margined internally with black. Loral region black, passing insensibly into dark 

 slate on the ears. Chin and throat between the white maxillary stripes black, ending on the upper part of tho breast in a 

 rounded outline. Tail black, edged externally with white. Bill blue. Length, 5.40 ; wing, 2.75 ; tail, 2.90. 

 Hab. — Valley of Rio Grande and of Gila. (As far west as Janos and the Mohave villages.) 



This species in external form is very similar to P. belli, and will probably fall in the same 

 genus. The cutting edges of the bill are much inflexed. The first quill is shorter than the 

 sixth. The tail is a good deal rounded ; the feathers broad. 



The white maxillary stripe does not come quite to the base of the under jaw, which there is 

 black. There is a hoary tinge on the forehead. The white superciliary stripes almost meet on 

 the forehead. 



In the immature bird the throat is white, the upper part of the breast streaked with brown. 



List of specimens. 



Calal . 

 No. 



40S8 



63-20 

 6321 

 6333 

 6317 

 6318 

 6319 

 6323 

 6304 

 6316 

 6315 



Sex and 

 age. 



9 



O 



Locality. 



When col- 

 lected- 



Whence obtained. 





Tamaulipas, Mexico Mar. — , 1853 



Ringgold Barracks, Tex. July —,1853 



Texas 



do 



Fronlera, Texas | 



do I May 5, 185-2 



do I do 



New Mexico ' 



do 



El Paso, N. M Dec. — , la!i4 



Boca Grande, N. M....' Mar. — , 1855 



Lieut. Couch . 



Major Emory.. 

 Lieut. J.G Parke 



do 



Major Emory . 



do 



do 



Lieut. J. G. Parke 



do 



Major Emory . 

 do 



Orig'l 

 No. 



Collected by — 



J. H. Clark... 

 Dr. Ili'erniaim 



J. H. Clark . 

 do 



do 



Dr. Hccrmann, 

 do 



J. II. Clark .... 



Dr. I^nnerly. 



Length. Stretch | Wing, 

 ofwings. 



5.25 7.50 



5.12 8.00 { 2.75 

 5.00 7.62 2.50 



5.50 I 8.00 



Remarks. 



Eyes dark brown ; bill 

 black ; feet lead color. 



Eyes black. (?). 



POOSPIZA BELLI, Sclater. 



Bell's Finch. 



Embtrixa belli, Cassin, Pr. A. N. Sc. Phila. V, Oct. 1850, 104 ; pi. iv. San Diego, Cal. 

 Pootpita belli, Sclater, Pr. Zool. Soc. 1857, 7. 



Sp. Ch. — Upper parts generally, with sides of head and neck, uniform bluish ash, tinged with yellowish gray on the crown 

 and back, and with a few obsolete dusky streaks on tho interscapular region. Beneath pure white, tinged with yellowiali brown 

 on the sides and under the tail. Eyelids, short streak from the bill to above the eye, and small median spot at the base of hill, 

 white. A stripe on the sides of the throat and spot on tho upper part of tlic breast, wiili the loral space and region round tho 

 eyts, plumbeous black. Tail feathers black -, the outer edged with white. Wing feathers all broadly edged with brownish 

 yellow ; tho elbow joint tinged with yellowish grocn. Bill and feet blue. Length, ().25 ; wing, 2.90. 



Ilab. — Southern Cnlifornia and valley of Gila and Colorado to Fort Thorn. 



This remarkable sparrow needs comparison with no other known North American species for 

 its identification. The tail is very long and considerably emarginated, and tlie outer feather 



