DENDRCECA NIGRESCENS, BLACK-THROATED GRAY WARBLER. 55, 



United States references which demoustrate the now well-known range. 

 I found this species common in pine- woods near Portsmouth, New Hamp- 

 shire, in June, under circumstances leaving no donbt that it was then 

 breeding'; and in the District of ColumLiia it is very abundant in high, 

 > open, mixed woods in May and September, associating with several of 

 its allies. 



A nest of the Black-throated Green Warbler, containing three eggs, 

 was obtained by Mr. George Welch at Lynn, Massachusetts. It is 

 composed, iirst, of fine twigs in small bits, then of various soft, pli;inf, 

 fibrous substances, composing the bulk of the nest, and lined with line 

 .^-asses and rootlets. The substance contains also a few feathers and 

 some downy material. The eggs measure 0.72 by 0.54, and are creamy- 

 white, rather coarsely spotted in a loose "wreath around the large end 

 with dark brown and neutral tint shell-markings. This nest measured 

 a little over three inches across bj' nearly two in depth, and is rather 

 neatly and compactly iinished. Another nest, from West Koxbury, 

 Massachusetts, is smaller and deeper, as w«ll as less regular in contour, 

 having apparently been placed iu an oblique fork. Tlie materials are 

 much the same, but there is a good deal of horse-hair circularly woven 

 inside. ' The eggs are four, smaller than the first described (0.C7 by 0.50), 

 pure white, with finer speckling more generally distributed, though pre- 

 serving its distinctively wreathed character. These eggs are sufficiently 

 dissimilar to have been laid by a different species. 



DENDEQECA NIGEESOENS, (Towns.) Bd. 



Black-throated Gray Warbler, 



Si/lria nigi-esceiis, Towns., Jonrn. Phil. Ac. vii, 1837, 191.— Aud., O. B. v, 1839, 57, pi. 395. 



Vei-mivora nlgresstins, Bv., List, 1838, 21. — NciT., Man. i, 1840, 471. 



Sylmoola iii'jrencmis, Aud., Syu. 1839, 60 ; E. A. ii, 1811, 62, pi. 94. — Bp., Cousp. i, 1850, 308. 



lihimanphnu iiigresccns, Cab., Mus. HkId. i, 1850, 20. 



Midotilta nigrcscms, Gi:ay, Geuera> of Birds. 



Dendrmua nigresceus, Bd., B. N. A. 1858, 270; Rev. 1865, 186.— Sci.., P. Z. S. 1858, 298; 

 1859, 374 (Oaxaca) ; Cat. 1832, 30.— Hui;i!M., P. R. Re;), x, 1859, pt. vi, 40.— 

 Coop. & Sacic, N. H. Wasli. Tev. 1830, 180.- Coues, Pr. Phila. Acad. 1866, 

 69.— SUMICII., Mem. Bost. Soc. i, 1839, 547 (Orizaba, rare).— Coop., B. Cal. 1870, 

 90.— Aiken, Pr. Bost. Soc. 1872, 197 (Colorado).— CouES, Key, 187-2, 98. 



" Sylvia lialsci, GiK., B. Tex. 1838, pi. 3 ( 9 )," {6(ilater). 



Sab. — Rocky Mountaius to tbe Pacific, United States ; soutli throngh Mexico. 



This species has proven not to be so exclusively a Pacific coast one 

 as was formerly supposed. I found it common in the pine-woods about 

 Fort Whipple, the latter part of April until toward October, aud have 

 reason to believe that it breeds there; but it is much more plentiful 

 during its migrations. Mr. Aiken's Ooloradoan record is the easternmost 

 I have seen ; Dr." Hayden did not meet with it, nor did Mr. Allen. 



Other western Warblers remaining to be detected on the eastern 

 slopes and foot-hills of the Eocky Mountains, are I), occidentalis and 

 townsendii, if not also D. gracia ; but I have at present no authority 

 for including, them in this work. 

 / 

 1^^ ^^ DENDEGECA CCEEDLESGENS, (Linn.) Bd. 



Dlack-throated Blue Warbler. 



Motacilla coerulescens, Gm., Syst. Nat. i, 1788, 960. 



SyUla eoerulescena, Lath., Ind. Orn. ii, 1790, 520. — Vieil-l., Ois. Am. Sept. ii, 1807, 25, iil. 

 80.— D'OUBIG., La Sagra's Cuba, Ois. 1840, 63, pi. 9, ligs, 1, 2 (Cuba). 



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