204 NORTH AMERICAN HIRDS. 



tliis species, seen l»y ^Ir. Keiinicott, were unilormly on the ground, generally 

 among 'j1iuiii>s ot low bushes, olten in the side of a bank, and usually liidden 

 by the dry leaves among which they were jJaced. He met with tlic^se nests 

 in the middle of June in the vicinity of CJreat Slave Lake. They were large 

 for the size of the bird, having an external diameter of four inclies, and a 

 height of two and a lialf. and api^earing as if made of two or three dis- 

 tinct fabrics, one within the (jther, of nearly the same materials. The ex- 

 ternal portions of these nests were com})osed almost entirely of long, coarse 

 strii>s of bark loosely interwoven with a few dry grasses and stems of jJants. 

 Within it is a more elaborately interwoven structure of finer dry gmsses and 

 mosses. Tliese are softlv and warmlv lined with hair and fur of small 

 animals. 



Nests from more arctic regions are of a different style of structure, homo- 

 geneous in materials, — which are chiefly stems of small plants and the finer 

 grasses, — and are of a UKjre compact make and smaller in size. 



Their eggs are from four to six in number, and vary in length from .70 

 to .0(1 of an inch, and in breadth from .50 to .45 of an inch. They have 

 a clear white ground, marked with spots and small blotches of reddish- 

 brown and fainter marking of purplish-slate. Tiie number of spots varies 

 greatly, some eggs being nearly unspotted, others jn-ofusely covered. 



Mr. liidgway met with this Warbler in great abundance during its autum- 

 nal migration among the shrubbery along the streams of the Sierra Nevada, 

 at all altitudes. In sunnner it was only seen among the high aspen woods 

 on the Wahsatch Mountains. Fully Hedged young birds were numerous in 

 July and August. Their usual note was a sharp chip. 



This bird was found breeding near Fort licsolution, on the Yukon, at 

 Fort Rae, and at Fort Anderson. 



The notice of geogra])hieal distribution of the different races, at tlie begin- 

 ning of the article, will serve to show to what varieties the precechng re:narks 

 severally belong. 



Helminthophaga celata, var. lutescens, Ktdgwat. 



PACinC OSANOE-CBOWHED WABBLEB. 



nchnintlwpluifjn cchta, CoorKR & Sucklky, P. R. R. XII, ii, 1859, 178. — Loud, Tr. K. 

 Art. Inst. Woolwich, IV, 18G4, 11.'). — Haiud, Rev. Am. Birds, I, 1865, 170 (in part). 

 — CoopEi:, Orn. Cal. I, 1870, 83. U. celaUt, var. lukscem, Ridgvvay, Rei>ort U. S. 

 Geol. Expl. 40th Par. 



Sp. Char. }fale. Upper surface continuous bright olive-green. Whole lower parts, 

 including; superciliary stripe and eyelids, bright yellow, almost gamboge ; abdomen some- 

 what whitish. Inner webs of tail-feathers just perceptibly ed,2re<l with white. Whole 

 crown hrio-ht orange-rufous, scarcely concealed. Wing, 2.40; tail, 1.90; bill, .40; tarsus, 

 .G7 : miildle toe, .45. Winjj-formula, 2, 3, 1, 4. Female. Similar, but oranjre of crown 

 almost obsolete. Wing, 2.30 ; tail, 1.90. Young of the year. Similar to adult, but with 



