JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 



223 



Upper plumage, rich green, showing more or less purple on upper 

 tail coverts; under parts, white; western species, only once taken in 

 Illinois. Tachycineta thalassina lepida. 



Northern Violet-green Swallow. 

 See No. 286. 



Tree Swallow. 



Entire under parts, white ; upper plumage, metallic steel blue ; 



young birds have the upper plumage brownish gray, but the under 

 plumage is pure white. Iridoprocne bicolor. 



Tree Swallow. White-bellied Swallow. 

 See No. 285. 



Upper throat and sides of the head, 

 chestnut brown; belly, whitish; forehead, 

 whitish; crown and back, dark steel blue; 

 upper tail coverts, pale rufous brown. 



Petrochelidon lunifrons. 

 Cliff Swallow. 

 See No. 283. 



Throat, chestnut; belly, pale brown; 



entire upper plumage, steel blue; tail 

 forked; upper tail coverts, steel blue. 



Hirundo erythrogastra. 

 Barn Swallow. 



See No. 284. 



