BIRDS OF PENNSYLVANIA. 281 



lice, flies, spiders, ants and larvae. It is stated, however, that this 

 species often feeds on small seeds and berries. 



Dendroica caerulescens (GMEL.). . 



Black-throated Blue Warbler. 



DESCRIPTION (Plate 97, male and female). 



Length about 5^ ; extent 8. 



Male adult. Uniform blue above; no white wing-bars but basal portion of 

 primaries (other than first) white, forming a conspicuous patch ; lores, a narrow 

 frontal line and plumage on sides of head, sides of breast, chin, throat and sides, 

 deep black ; rest of under parts white ; outer tail feathers spotted on inner webs 

 with white (these spots in female, and the young, in fall are much restricted). Bill 

 blackish ; legs (dried skins) brownish, but in autumnal specimens are often much 

 paler. 



Female. -Grayish olive-green above ; tail and wings, especially the former, with a 

 bluish cast ; lores and ear-patches dusky ; a pale whitish line from nostrils above and 

 back of eye ; eyelids whitisli ; white patch on primaries as in male but smaller ; 

 white spots on tail feathers indistinct ; chin, throat, breast and rest of under parts 

 dull (soiled) yellow. 



Habitat. Eastern North America to the plains, breeding from northern New 

 England and northern New York northward, and in the Alleghanies to northern 

 Georgia ; West Indies in winter. 



The Black-throated Blue Warbler occurs generally throughout Penn- 

 sylvania only as a passing visitor in the spring and fall. Dr. Van Fleet 

 has found this warbler breeding in Clarion and Clearfield counties, and 

 Prof. A. Kock has observed it as a regular summer resident of Lycoming 

 county. I have repeatedly seen these birds in the mountainous regions 

 in different sections of the central and northern parts of the state, and 

 there can be no doubt but that they breed regularly in nearly all our 

 higher mountainous regions. The female of this species, although con- 

 siderably different from the male in his showy coat of blue, black and 

 white, can always be known by the white patch at base of primaries. 



Dendroica coronata (LiNN.). 



Myrtle Warbler. 



DESCRIPTION (Plate 98, male). 



Rump, crown and sides of breast yellow, in all plumages more or less distinct 

 Length (average of six specimens) male 6 inches ; extent (three specimens in flesh) 

 9^ ; wing 3 or a little less. Female somewhat smaller ; bill and legs black. 



Male, in spring. Above slate-blue, streaked with black ; two wing-bands white 

 and inner webs of outer tail feathers spotted with same ; lores and sides of head, and 

 most of breast and sides (except as above mentioned) black; chin, throat, eyelids 

 and superciliary line, and belly white. 



female. Similar but much duller. Autumnal specimens are chiefly brownish 

 above, with blackish streaks ; below much lighter and quite thickly streaked. 



Habitat. Eastern North America, chiefly, straggling more or less commonly 

 westward to the Pacific ; breeds from northern United States northward, and winters 



