236 



WARBLESS. 



1*. SYCAMORE WAKELER, K. D. ALBILORA. Smaller 

 than 1 with a smaller bill, line at base of bill with little orno 

 yellow. Mississippi Valley, north to southern Mich., east to 

 Ohio and casually to S. C. during migration. 



c. Blue Warblers. Caeruleocantor. 



Bill, wings, and tail coverts, rather short; feet, small; 

 tail spots, present ; white spot at base of primaries ; no wing 

 bands nor yellow markings; sexes dissimilar. Origin of 

 group, north-western S. A. Type, Motacilla caerulescens 

 Gmelin. 



Fig. 310. Fig. 311. 



CC, H, b, 1. 1-3. CC, H, c, 1. 1-3. 



1. BLACK-THROATED BLUE WARBLER, C. CAERU- 

 5.25; dusky-blue above; white beneath, fig. 311. 

 Female, olivaceous above, ochraceous-white beneath and on 

 line over eye ; white wing patch present. Common, breeding 

 from the mountains of Penn., eastward to western Mass., 

 east through Worcester Co., north to Hudson Bay ; winters in 

 Bahamas, West Indies, and north-eastern S. A. ; north in May ; 

 south in Sep. Song, a zweeing lisp rather weak. Occurs us- 

 ually in swampy, sometimes other, thickets. 



1*. CAIRN'S WARBLER, C. c. CAIRNSI. Differs from 

 1 in being darker above where it is more or less clouded with 

 black. Higher mountains of Penn. and N. C, 



