270 U. S. BP. R. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
List of specimens. 
Catal. No. | Sex. Locality. When collected. Whence obtained. Collected by— 
2918 © 1|(Columbiamzivers------2-- Oct. 28, 1835 --_-- Sib Balt depereictcsce a = = J. K. Townsend ifs <cisicas 
44802 |____.- Santa Clara, Cal..-..--.. 185b eee a esac Drei Gal COOpCha ee aaa een ata awa es oe 
448120 Se ec|se> oe Ose samen sase ace N33) Detention ere eterna ceteris donee sneceeen sees (ee see ee cee cae eas 
42 Pees | NODE MCXICO Mena aee na ae oonm anes ee ene ibH deeds hhc | oe ec seme eee cee 
80L%. /2-5-- Guatem alates eee ae Sata eee ane Soe GOUT Se cecetet tee cee | mee meaner A RR re ne 
1Length. 5.25; Extent, 8.12. ch 2Length, 5.12; Extent, 7.75, Iris, bill, and feet brown. 
DENDROICA NIGRESCENS, Baird. 
Black-throated Gray Warbler. 
Sylvia nigrescens, Townsenn, J. A. N. Sc. Ph. VII, m1, 1837, 191. -Is. Narrative, 1839, 341.—Aup. Orn. Biog. V, 
18395575 5pls 395: 
Vermivora nigrescens, Bonar. List, 1838.—Nurrat, Man. [, 2d ed. 1840, 471. 
Sylvicola nigrescens, Aup. Syn. 1839, 60.—Is. Birds Amer. II, 1841, 62; pl. 94.—Bonar. Consp. 1850, 308. 
Rhimanphus nigrescens, Cas. Mus. Hein. 1850, 20. 
Sp. Cu.—Head all round, fore part of the breast, and streaks on the side of the body black ; rest of under parts, a stripe on 
the side of the head, beginning acutely just above the middle of the eye, and another parallel to it, beginning at the base of the 
under jaw (the stripes of opposite sides confluent on the chin,) and running further back, white. A yellow spol in front of the 
eye. Rest of upper parts bluish gray. The interscapular region and upper tail coverts streaked with black. Wing coverts 
black, with two narrow white bands ; quills and tail feathers brown, the two outer of the latter white, with the shafts and a 
terminal streak brown; the third brown, with a terminal narrow white streak. Bill black; feet brown. Length, 4.70 ; 
wing, 2.30; tail, 2.10. 
Hab.—Pacific coast, United States ; Fort Thorn, New Mexico. 
Winter specimens have the black of the crown obscured by gray ; that of the throat by white. 
A specimen, supposed to be a female, is smaller, but somewhat similar to this; the chin and 
throat white, with slight indications of black ; more of this on the side of the breast. 
This species scarcely needs comparison with any other North American one, except, perhaps, 
D. striata, which, however, is entirely distinct ; lacking the black throat, the two white stripes 
on the side of the head, the yellow spot in front of the eye, &c. 
List of specimens. 
Catal. |Sex. Locality. When collected | Whence obtained. | Orig. | Collected by— | Length. | Stretch | Wing. 
No. No. of wings. 
7686 |.-..| FortSteilacoom, W.T.| May 6, 1856 | Dr. Suckley.---- S184 \cs5 oss oneec assed sec cee ann| poss eces ae eee 
6Siall==ss|seme== OS se 500 Ses OSReREceancl eoce dozscseens 14 \oncoeddcwe... jooce|bmsteoeeleoeeenesltameae 
f688i)|oeaclsaeee = dOs=senaes=e=— baaepSeooacons lEsocee doneess=es VOGi es eReees = So aeeee | aeee anes |e ae | ene 
ION teh SG555s doseeaeesaaaae May 4, 1856 |..--.-- dOcaaeeses Sec aae|seasenseeeiene 5. 25 7.12 2. 50 
1908 | ¢& | Columbia river.----- JUNEWG, L830 || 8. .h bard. ...0|=ee5 = | J). Ks. Rownsend2 R252 2225) oaneecn|senene 
2915 | @ |------ doe ee asst May 14, 1835 |__.... Oa eee [eee 622 Sates ce ee Se eee : 
7690 | 3 | Calaveras river .-.--.|-------------- R. 8. Williamson .|._...- | ‘Dr. Newhberryi2-|Scee2--|=-2-ee esl seeeee 
716899 sao PROrt DOr, New Meee emai aecie aise as DrpHenryiasoes| Soot as seasae Seem see Seeeeee aaa | cemetantet 
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