FAMILY HIRUNDINIDJS. SWALLOWS. 



265 



FAHILY HIRUNDINID^E. 



Swallows. 



Bill, small and flattened, somewhat triangular in shape; gape, very 

 wide ; wings, long, usually extending beyond the tail. 



Group 1. Wing, 3 25 to 4.75 inches long. 



Bank Swallow. 



Throat and belly, white; a band of grayish brown on the breast; upper 

 plumage, brownish gray. 



Bank Swallow. 



Clavicola riparia- 

 See No. 463. 



Underparts, brownish gray, shading into whit- 

 ish on the belly ; upper parts, grayish brown ; 

 no distinct breast band. 



Rough-winged Swallow. 



Stelgidopteryx serripennis. 

 See No. 464. 



