52 HOW TO NAME THE BIRDS 



an imperfect steel-blue collar across breast ; distinguished 



from all other swallows by forked tail. 



Nest, of mud, lined with soft material; eggs, middle of May, 3-6, 

 white, thickly spotted. 



110. SOLITARY VIREO: BLUE-HEADED VIREO. 



Olive-green White. 



5J^. Head, bluish-ash ; see 27, 



111. INDIGO-BIRD. 



Indigo-blue. 

 S/4' Wings and tail, blackish ; see 39. 



112. CLIFF SWALLOW : EAVE SWALLOW. 



Steel-blue Chestnut. 



5-5/^. Forehead, light brown ; sides of head and rump, 



chestnut; wings and tail, dark; tail, emarginate ; throat 



and breast, chestnut, breast paler, with steel-blue spot ; 



abdomen, white. 



Nest, somewhat gourd-shaped, of mud, lined, under eaves, in colo- 

 nies ; eggs, middle of May, 3-6, white, thickly spotted. 



113. COERULEAN WARBLER. 



Azure-blue, dark-streaked White, blue-streaked. 



4;^. See 55. 



114. SUMMER RED-BIRD: SUMMER TANAGER. 



Vermilion. 



7^-8. $ , above, brownish-olive ; below, pale buff-yel- 

 low. 



Rarely north to Mass., seldom in Conn., rare in Pa., not found in 

 N. J. ; nest, rude, in tree or thicket, not far from ground ; eggs, lat- 

 ter part of May, 3-5, pale greenish-blue, thickly spotted. 



114"^. CARDINAL GROSBEAK. 



Vermilion. 

 8>^. Crested ; see 58. 



