Appendix. 



143. ClifF Swallow ; Petrochehdon luntfrons 

 (Say). 



This and the following species are two of the most 

 generally distributed and common summer resi- 

 dents of North America. Length about five 

 inches. General color above lustrous bluish 

 black; a gray collar on neck and the forehead 

 white or pale brownish; upper tail-coverts 

 rufous; chin chestnut; a black spot on throat; 

 breast bufFy brown paling to grayish and 

 white on the belly. Tail short and square. 

 Everywhere common, nesting under eaves of 

 barns. 



144. Barn Swallow ; Hirundo erythrogaster 

 Bodd. 



General color above lustrous bluish black. Fore- 

 head and throat rufous, the belly buffy brown or 

 rufous. An irregular bluish black collar below. 

 Outermost pair of tail-feathers greatly elongated 

 into the typical swallow tail. Female similar 

 but duller. A beautiful and abundant summer 

 resident. 



145. White-bellied Swallow; Tachycifieta bicolor 

 (Vieill.). 



Length six inches. Above dark glossy bluish, 

 below pure white. Nesting in bird boxes or 

 holes in trees. A summer resident of the foot- 

 hills and mountains, both of the Coast Range 

 and the Sierra Nevadas. Migrating south 

 through the valleys. 



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