FIELD KEY TO THE LAND BIRDS. 43 
114. YELLOW WARBLER. Dendroica aes- 
tiva. — Length, 5 inches. Yellow, upperparts green- 
ish ; underparts streaked with red-brown. 
115. BLACK-THROATED BLUE WAR- 
BLER. Dendroica caerulescens. — Length, 54 inches. 
Blue-eray above; sides of head, throat, and sides 
black; belly white; a white patch on wing. 
116. YELLOW-RUMPED OR MYRTLE 
WARBLER. Dendroica coronata. — Length, 53 
inches. Bluish gray; throat and belly white; a 
yellow patch on the top of the head, one on the tail 
coverts, and one on the side; two white bars on the 
wing. 
aig.  BLACKA-AND YELLOW OR MAGNO 
LIA WARBLER. Dendroica maculosa .— Length, 
5 inches. Cheeks and forehead black; crown blue- 
gray; back olive green; throat and tail coverts yel- 
low; belly white; a white line over the eye; a white 
patch on wing; most tail-feathers white in the 
middle. 
118. CHESTNUT-SIDED WARBLER. Den- 
droica pennsylvanica. — Length, 5 inches. Top of 
head yellow: back gray or green; ear, underparts, 
wing bars, and spots on tail white; sides chestnut; a 
black patch before and behind the eye. 
