DENI)i;fE(JA NIGllESCENS— D. ATTDUEONr. 4;)3 



Dendhceca nigrescens. 



KSark-StiB'oaSt'd Gray ^Vsivblor. 



Sylvia nigrcscens, Townsend, Journ. Ac. Nat. Sci. Eliilad., VII., ii, 1837, 191. 



Dcnilrceca nigrcsccns, Baird, B. N. Am., 1858, 270; Catal., 18,"»0, No. ]!)2; Rpviow, 

 18G5, ISC— Cooper, Orii. Cal., 90.— CouE.s, Key, 1872, 98; Check List, 

 1873, No. 75; B. N.VV., 1874, 55.— B. B. & II., Hist. N. Am. B., I, 1874, L'.5.s, 

 111. XII, (Ig. 8.— OEjJsnAW, 1875, 188. 



Tlie Black-throated Gray Warbler doubtless breeds on all the higher 

 moniitaiiis of the Western Region, since Mr. C. E. Aiken has discovered it' 

 to be a sunnner resident on the most eastern ranges in Colorado, while it has 

 long been known as a summer bird of the Pacific Coast district; but the 

 mountains of the Great Basin having sufficient timber-growth — a condition 

 essential to the presence of this species — are very few, and so far between, 

 that we met with it at few localities. On the eastern slope of the Ruby 

 ]\Iountains, it was abundant in July and August, in the pifion and cedar 

 woods, never entering- the brushwood in the canons. A few individuals 

 were also seen in Pack's Canon, Uintah Mountains, Avhere they inhabited 

 the lower slopes which were covered with a scattered growth of scrub- 

 oaks and mountain-mahogany. At the former locality, several families of 

 full-grown young were observed still following their parents. Their song 

 was not heard, but their ordinary note greatly resembled the sharp chip 

 of the eastern Yellow-rump {I), coronata). 



Lint of specimens. 



810, £; East riumboldt Mountains, Nevada, July, 14, ISOS. 4J— TJ— {?)— 2,\. 

 Bill, tlecp black; iri.s, dark -sepia; tarsi and toes, sepia-black. 



855, (?; East Humboldt Mouutains, August 4, 1808. 5g — 7^ — (?) — 2\. Same re- 

 marks. 



803, <?; August 7, 1808. 5J— 7g— (?)— 2i. Same remarks. 



800. 9 ; August 10, 1808. 5— 7,y— ( ? )— 2. Bill, black, slightly lilaceons at base of 

 lower mandible. 



DeNDPvCECA auduboni. 



Audsiboia's Wai-bit^r. 



Sijlria audnhonii, ToWNSEiS'D, Jouni. Acad. Nat. Sci. Philad., VIE, ii, 1837, 190. 



Dendrceca miduhonii, Baihd, B. N. Am., 1858, 273; Catal., 1859, No. 195; Eeview, 

 1805, 188.-— Cooper, Orn. Cal., 88.— Coues, Key, 1872, 100; Check List, 

 1873, No. 79; B. N.W., 1874, 58.— B. B. & R., Di'st. N. Am. B., I, 1874, 229, 

 pi. XIII, fig. 1.— Hensuaw, 1875, 194. 



As is the case with the eastern Ycllow-rumped Warbler {D. coronata), 



