In early summer found in scattered pairs which 

 nest in hollow trees, stumps, fence-posts, bird- 

 boxes. 



6 1 6. Bank Swallow Riparia riparia. 



Sparrow-size. Length 5% inches. 



Upperparts brownish gray; underparts white; a 

 dark band across the breast. 



Nests in colonies which honey-comb sandy banks 

 of rivers, sand pits and railroad cuts with the 

 tunneling of their nesting chambers. 



617. Rough-winged Swallow — Stelgidopteryx 

 serrtpennis. 



Sparrow-size. Length 5.% inches. 



Upperparts brownish gray, paler on throat and 

 breast; belly white. 



Resembles somewhat the Bank Swallow, but 

 lacks the breast-band and white throat; sometimes 

 nests about bridges and similar structures as well 

 as in sandy banks. 



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