2G{j 



KEY TO THE BIKDS OF EASTERN NORTH AMERICA. 



Tree Swallow. 



Entire underparts, white ; upper plumage, metallic steel blue ; youug birds 

 have the upper plumage browuish gray, but the under i)Uiinage is pure white. 



White-bellied Swallow. 

 Tree .Swallow. 



Tachyciup.ta bicolor. 

 See No. 462. 



Upper throat and sides of the head, chestnut 

 brown; belly, whitish; forehead, whitish; 

 crown and b;K'l<. dark steel l)lue; upper tail 

 coverts, pale rufous brown. 



Cliff Swallow. 

 Petrochelidon lunifrons 

 See No. 458. 



Throat, chestnut; belly, pale brown; eutire 

 upper pluinag*', steel IjIuc; tail, forked ; upper 

 tail coverts, steel blue. 



Barn Swallow. 



Chel ido n e rythror/astra . 

 See page 461. 



