652 Field Museum of Natural History — Zoology, Vol. IX. 



315. Dendroica cerulea (WiLS.). 



Ceruleax Warbler. 



Disir.: Eastern North America and southern Ontario, west to 

 the Dakotas, Nebraska, Kansas, and eastern Texas, rare east of New 

 York; breeds from West Virginia, Tennessee, Alabama, and eastern 

 Texas north to Wisconsin and Minnesota. 



Adult male: Upper plumage, light blue, shading to grayish blue 

 on the rump ; back streaked with black ; crown with more or less 

 black markings; ear coverts, dusky ; a white superciliary line; throat, 

 breast, and belly, white; a band of grayish blue or dusky blue across 

 upper breast; sides of body, white, streaked with grayish blue and 

 dark blue; wing coverts tipped with white, forming wing bands; 

 tail, blackish, all the feathers except the middle ones with subterminal 

 white blotches on inner webs. 



Adult female: Upper plumage, dull greenish blue or grayish green, 

 with or without faint streaks of dusky; superciliary line, whitish; 

 throat and under parts, whitish, more or less washed with dull, 

 yellowish or pale greenish yellow; no band on breast; tail markings 

 as in the male. The white edgings to the wing coverts and different 

 tail markings will always distinguish the female of this species from 

 that of D. ccerulesceiis. 



Length, 4.40; wing, 2.65; tail, 1.90; bill, .^8. 



The Cerulean Warbler is a summer resident in Illinois; common 

 in the southern part of the state, but casual or rare in northern 

 Illinois and in Wisconsin. 



Mr. Ridgway considers it "by far the most abundant of the sum- 

 mer resident members of the family in Illinois." Mr. Frank M. Wood- 

 ruff writes (Birds of the Chicago Area, 1907, p. 162): "The Cerulean 

 Warbler is a rare summer resident in the heavy timber of DuPage 

 County, Illinois, and a few probably breed in the woods bordering 

 the Desplaines River at River Forest. Mr. B. T. Gault has observed 

 this species during the summer months in DuPage County and at 

 Lake Forest, Illinois. It arrives from about the tenth to the twen- 

 tieth of May, and departs early in September. Mr. H. K. Coale in- 

 forms me that he shot a male Cerulean Warbler at Winnetka, Illi- 

 nois, on May 12, 1879, and that he also found them breeding in woods 

 seven miles west of Lake Forest, Illinois, in 1876." 



Messrs. Kumlien and Hollister state: "A rather rare species in 

 Wisconsin, though of regular occurrence, especially along Lake 

 Michigan. There are many records for Lake Koshkonong, as this 

 section has been closely observed for a long period. There are also 



