BIRDS OF ONTARIO. 67 



buildings he erects afford them convenient nesting-places, of which the 

 House Sparrow unfortunately is dispossessing them. 



GENUS PROGNE. 



(611) Purple Martin. 



(Progne subis.) 



A common summer resident ; breeding throughout its range in the 

 Province. 



Arrives about the fifteenth of April, departs early in September. 

 This is one of the birds which appears to be rapidly decreasing in 

 southern Ontario and increasing northward and in Manitoba as the land 

 is settled. 



GENUS PETROCHELIDON. 



(612) Cliff Swallow. 



(Petrochelidon lunifrons.) 



A regular summer resident, somewhat irregularly distributed, being 

 abundant at some points and absent from others. 



Breeds in colonies under the eaves of barns, etc., throughout its 

 range in the Province. 



Arrives early in May, departs in August. 



GENUS HIRUNDO. 



(613) Barn Swallow. 



(Hirundo erythrogaster.) 



A common summer resident, breeding in barns and outhouses 

 throughout its range in the Province. 



Arrives about the end of April, departs early in September. 



GENUS IRIDOPROCNE. 



(614) White-breasted Swallow. (Tree Swallow.) 



(Iridoprocne bicolor.) 



A common summer resident, breeding in holes in the side of build- 

 ings, nest boxes, etc., throughout its range in the Province. 



Arrives quite early in April, departs about the end of September. 



GENUS RIPARIA. 



(6 1 6) Bank Swallow. (Sand Martin.) . 

 (Riparia riparia.) 



An abundant summer resident, breeding in colonies in holes in sand- 

 banks, throughout its range in the Province. 



Arrives about the beginning of May, departs abouf the middle of 

 September. 



