558 GEOLOGICAL SURVEY OF NEW JERSEY. 



D. ccerulea, Wils. Ccerulean or Blue Warbler. 



Spots at end of nearly all tail feathers ; crown and back blue, 

 with black streaks ; white below ; no yellow ; female greenish 

 above ; slightly yellow below. Length, 4 J inches; tail, 2 inches. 



" Like the castanea, is a rare species, and only to be met with 

 once or twice in a series of springs. Author has killed but one." 

 — [C. C. A.] 



D. pennsylvanica, L. Chestnut-sided Warbler. 



Much streaked ; blackish above ; crown clear yellow ; black 

 about eye ; pure white below ; chestnut streaks along sides ; 

 wing patch yellowish (never pure white) ; female has less black 

 and chestnut. Length, 5 inches ; tail, 2^ inches, 



" Common. Arrives about May 1st, and many remain during 

 the summer. Prefers swamps to open ground, and haunts, where 

 it builds its nest, low, tangled vines and bushes." 



D. castanea, Wils. Bay-breasted Warbler. Autumn Warbler. 



Back black and olive ; thickly-streaked forehead and sides of 

 head black, enclosing a deep chestnut crown patch ; chin, throat 

 and sides, dull chestnut ; otherwise pale ; bulFy below ; female 

 more olivaceous, with less chestnut ; young nearly like young of 

 D. striata, but more buflpy below. Length, 5 inches; tail, 2| 

 inches. 



"Rarely seen. During the month of May, occasionally a 

 severe northeast storm detains the warblers generally, and when 

 such is the case, the above, with several others, are sometimes 

 seen." 



D. striata, Forst. Black-poll Warbler. 



Crown pure black ; general color black and olivaceous, every- 

 where streaked ; female more olivaceous, and slightly yellow 

 below. Young male olive green, streaked ; rump grayish, white 

 and olive ; olive yellow below ; flanks rusty ; female not streaked, 

 and flanks not rusty. In second year general color is dull gray, 

 streaked ; a dull white below, spotted with black. Length, 5f 

 inches ; tail, 2| inches. The last to migrate. 



" Very abundant, frequenting elm trees in preference to all 

 others, and remains longer during both spring and autumn, but 

 none have been noticed to remain during the summer." 



