SYLVICOLID.E — THE WARBLERS. 241 



Yellow of under parts confined to jugulum ; rest of under parts white ; 

 the sides streaked with black ........ (jracia'. 



Yellow of under parts extending to crissum. Sides scarcely streaked. 



adelaida'. ' 



In the Eeview (p. 209) several variations in this species are noted ; but at 

 that time there was not a sufficient number of specimens to warrant our 

 coming to a conclusion as to their value. Now, however, we have better 

 material before us, and upon the examination of al)Out thirty specimens, in- 

 cluding two series of nearly equal numbers, — one from the Atlantic States 

 and the West Indies, the other from the Mississippi region and Middle 

 America, — find that there are tw^o appreciably different races, to be distin- 

 guished from each other by points of constant difference. All birds of the 

 first series have the bill longer than any of the latter, the difference in a 

 majority of the specimens being very considerable ; they also have the super- 

 ciliary stripe bright yellow anteriorly, while among the latter there is never 

 more than a trace of yellow over the lores, and even this minimum amount 

 is discernible only in one or two individuals. The West Indian form is, of 

 course, the true dominica, and to be distinguished as var. domimica ; as none 

 of the synonymes of this species were founded upon the Mexican one, how- 

 ever, it will be necessary to propose a new name ; accordingly, the term var. 

 albliora is selected as being most descriptive of its peculiar features. 



The following synopsis, taken from typical specimens, sliows the differ- 

 ences between these two races : — 



(Xo. 3,322, ^, Liberty County, Georgia.) Bill (from nostril), .45; tarsus, .60; 

 Aving, 2.60 ; tail, 2.00. Superciliary stripe, anterior to eye, wholly bright yellow ; 

 yellow of chin and maxilte extending to the bill. Hab. In summer, Atlantic 

 States of United States, north to Washington. In winter, and possibly all 

 the year, in Cuba, Santo Domingo, and Jamaica . . . . var. dominica. 



(No. 61,136, (J, Belize, Honduras.) Bill (from nostril), .35 ; tarsus, .00; wing, 

 2.70; tail, 2.20. Superciliary stripe wholly white; yellow of chin and maxillte 

 bordered narrowly next the bill with white. Hab. In summer, the Mississippi 

 region of United States, north to Lake Erie ; common in South Illinois. In 

 Avinter, and possibly all the year, in Mexico, south to G-uatemala, Yucatan on 

 the Atlantic, and Colima on the Pacific side var. albilora . 



Habits. The lii story of the Yellow- throated Warbler is very imperfectly 

 known. Its geographical distribution is irregular and apparently eccentric. 

 Found occasionally, rather than frequently, in the Southern Atlantic and Gulf 

 States, it occurs irregularly as far north as Washington, New York City, 

 Cleveland, 0., Union County, 111., and Kansas. In the last place it is sup- 

 posed also occasionally to breed. West of this it has not been traced in any 

 portion of the United States. It was obtained in Tamavilipas, Mexico, by 

 Lieutenant Couch, and on tlie western coast Mr. Xantus found it at Colima. 

 Mr. Sclater has also procured it from other portions of Mexico, and M. Bou- 



' Dcndroica adclaidcc, Baikd, Pk-v. lSt55, 212. Hab. Porto Eico. 

 31 



