DENDRfECA NIGIIESCENS— D. AUDUDONI. 433 



DENDRa<:CA NIGRESCENS. 

 B!uck-tlir«a!4-cl Oray Warbler. 



Sylvia nigrescens, Townseni), Joiirn. Ac. Nat. Sd. I'liilad , VII., ii, 1837, 191. 



Dendraca nigrescens, Baikd, B. N. Am., 1858, 270; Cafal., 18.50, No, 192; Review, 

 ISO.-), 18G.— CodPER, Oin. Cal., 90.— CoiES, Key, 1872, 98; Clieck List, 

 1873, No. 7.5; B. N.W., 1874, 53.— B. B. & R., Uist. N. Am. B., I, 1874, 2.58, 

 pi. xir, fig. 8.— Henshaw, 1875, 188. 



Tlie Black-throated Gray AVarbler doubtless breeds on all the lii-lier 

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

 to be a summer 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 

 Mountains, it was abundant in July and August, in tlie pinon and cedar 

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

 were also seen in Pack's Canon, Uintah Mountains, where 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 jwrents. Their song 

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

 of the eastern Yellow-rump (Z>. coronata). 



List of specimens, 



840, <?; East riumboltlt Mountains, Nevada, Jiilj-, 14, 1808. 4J— 7?— (?)— 2,\. 

 Bill, deep black ; iris, dark .sepia ; tarsi and toes, sepiablack. 



855, (f ; East Humboldt Mountains, August 4, 1808. 5^ — 7J— (»)_2J. Same re- 

 marks. 



SC3,<?; August 7, ISGS. 5J— 7g— (?)— 2^. Same remarks. 



8GG, 9 ; AugusJL 10, 1808. 5— 7g— ( ? )— 2. Bill, black, slightly lilaceous at base of 

 lower inaudible. 



Dendrojca AUDUBONI. 



Audubon's Wnrblor. 



Syhia audubonii, ToWNSENU, .Jouin. Acad. Nat. Sci. Pbilad., Vlf, ii, 18.37, 190. 



Deudmca auditbonii, Baiud, B. N. Am., 1858, 273; Catal., 1859, No. 195; Review, 

 18G5, 1.88.— Cooper, Orn. Cal., 88.— Cores, Key, 1872, 100; Clieck List, 

 187.3, No. 79; B. N.W., 1874, 58.— B. B. & R., Ui.st. N. Am. B., I, 1874, 229, 

 pi. xiit, fig. 1.— IlENsnAW, 1875, 194. 



As is the case with the eastern Yellow-rumped Warbler (Z). coronata), 

 28 p u 



