590 



NORTH AMilUICAN BIRDS. 



B« Tliniiii wliite; sides streiikcd. 



;!. P. belli. Xo white siiperi'iliarv stripe. A dusky spot in middle of 

 till' Ill-cast. Upper parts asliy, comtoloivd, witli indistinet streaks on tlio 

 liai'k. Wings somewiiat more brownisli, tlie coverts witii two indistinet 

 li^'iit (not wliilt?) bands. 



a. Wing, 2.r)0; tail, '2M; bill, .31 ; tarsns, .74. Dorsal streaks 



obsolete. Hah. Calilbrnia. var. helli. 



/3. Wing, :!.20; tail, :!.20; bill, .;jo ; tarsus, .70. Dorsal streaks 

 distinct. Hah. Middle Province of United States. vox, n e vndensis. 



Foonpiza bilineata, Sclateu. 



BLACK-THROATED 8PABB0W. 



Emhcrizu bilineata, Cassin, Pr. A. N. Sc. Ph. V, Ort. 1850, 104, pi. iii, Texas. — In. 

 Illust. I, V, 18.54, 150, pi. .x.viii. Paospiai bilinatla, ScLATUU, I'r. Zoiil. Soc. 1857, 7. 

 — Haiki), IHrils N. Am. 1858, 470. - Id. Me.\. Bound. II, Birds, 15. — Hhku.m. X, 

 c. 14. — Cooi'Eit, Orn. C'al. I, 1870, 203. 



Sp. CuAii. Above uniform unspotted a-sliy-gray, tinged with light brown ; purer and 

 more plumbeous anteriorly, and on sides of head and neck. Under parts white, tinged 



with plnnilieous on the sides, and with 

 yellowish-brown about the thighs. A sharply 

 defined superciliary and maxillary stripe of 

 pure white, as also the lower eyelid, the 

 former margined internally with )>lack. Loral 

 region black, passing insensibly into dark 

 slate on the ears. Chin and throat between 

 the white ma.xillary stripes black, ending on 

 the upper part of the breast in a rounded 

 outline. Tail blac^k, the lateral feathers edged 

 externally and tipped on inner web with 

 white. Bill blue. Length, 5.40 ; wing, '2.7") ; 

 tail, 2.90. Sexes alike. 



ITah. Middle Province of United States 

 noith to 40°, lietween Rocky Mountains and Sierra Nevada. (As far west as Janos and 

 the Mohave villages.) Matamoras (rare at San Antonio: Drksskr, Ibi.s, 18(!5, 488). 



This species in external form is very similar to 7'. hclli, and will probably 

 fall in the same ^'cnus. The cutting edges of tiie Vtill are much intlexed. 

 Tlie first (juill is shorter than the sixth. The tail is a good deal rounded ; 

 the feathers bi'oad. 



The white maxillary stripe does not come (|uite to the Ijase of the under 

 jaw, which tliere is black. There is a hoary tinge on tlie forehead. The 

 white superciliary .stripes almost meet on the forehead. 



In the iminivture bird the tln-oat is white with a dusky clouding along 

 each side ; the upper part of the breast strciiked with brcwn. 



Habits. The Hlack-tiiroat"d Sparrow, generically associated with Bell's 

 Finch, has several well -marked distinctive peculiarities in habits. Their 

 eggs are also totally unlike those of the present species, being much more 



Pons/iiza bilineata. 



