SYLVTCOLID^ — THE WARBLERS. 303 



Mr. John Burroughs, of Washington, was so fortunate as to obtain the 

 nest and eggs of tliis Warbler near the head-waters of the Delaware Kiver, 

 in Roxbury, Delaware County, N. Y. " The nest," he writes me, " was 

 in the edge of an old Ijark-peeling, in a hemlock wood, and was placed in 

 some ferns about one foot fi'om tlie ground. The nest was quite massive, its 

 outer portions being composed of suiall (by stalks and leaves. The cavity 

 was very deep, and was lined witli hue black roots. I have frequently 

 observed this Warbler in that section. About the head of the Neversink 

 and Esopus, in the northwest part of Ulster County, New York, they are the 

 prevailing Warbler, and their song may be heard all day long. Tlieir song 

 suggests that of the Kentucky Ground Warbler, but is not so loud and line." 

 Mr. Burroughs states else^^•here that " tlie eggs, three in number, were of 

 light ilesh-color, uniformly speckled with fine brown specks. The cavity of 

 the nest was so deep that the back of tiie sitting bird sank below the edge." 



Their eggs are of an oblong-oval shape, pointed at one end. They measure 

 .75 by .55 of an inch. Their ground-color is a pinkish-white, and they are 

 marked with dots and blotches, of varyiug size, of dark purplish-brown. 



Geothlypis macgillivrayi, B.urp. ^ 



MACGILLIVKAY'S GROUND WARBLER. 



Sylvia mnccjilUvrayi, AuD. Orn. Biog. V, 183!), 75, jil. cccxeix. Triclias mncg. Ann. 

 Geothlypis mil eg. BAir.D, Birds N. Am. 18,58, 244, pi. Ix.xix, fig. 4; Rev. 227. — Sclateu, 

 Catal. 1861, 27 (Jalapa and Guat.). — In. P. Z. S. 1859, 363, 873 (Xalapa, Oaxaca). — 

 Cab. Jour. 1861, 84 (Costa Kica). —Cooper & Suckley, P.-R. R. Rep. XII, ir, 1859, 

 177. — Cooper, Orn. Cal. I, 1870, 96. Sxjlvicola macg. Max. Cab. Jour. VI, 1858, 

 118. Sylvia tolmicci, Towns. J. A. N. Sc. 1839. Tricluis tolmiwi, Nutt. Man. I. 

 Triclms vcijcta (LicHT.), Bp. Consp. 1S50, 310 ; fide Cab. Jour. 1861, 84 (Mexico). 



Sp. Char. Adult male. Head and neck all round, throat and forepart of tho breast,, 

 dark a.-;h-color ; a narrow frontlet, loral region, and .?pace round the eye (scarcely complete 

 liehindj, black. The eyelids above and below the eye (not in a continuous ring) white. 

 The feathers of the chin, throat, and fore breast really black, with ashy-gray tips more or 

 less concealing the black. Rest of ufiper parts dark olive-green (sides under the wings 

 paler); of lower, bright yellow. Female with the throat paler and without any black. 

 Length of Miale, 5 inches; wing, 2.45 ; tail, 2.45. yoMni; not seen. 



Had. Western and Middle Provinces of United States, to northern boundary ; east to 

 Fort Laramie; south to Costa Rica. 



The wliite eyelids of this species distiugui.sh its males from those of U. 

 philnddphia, in which there is a black jugular patch not seen in the present 

 species. The females can only be known by the slenderer bill and more 

 rounded wing, the first quill being intermediate between the fifth and si.xth, 

 instead of being considerably longer tlian the fifth. 



The autumnal adult male is as described above, except that there is a faint 

 tinge of green on the crown, and the ashy borders to feathers of throat and 



