1909.] THE CAYUGA LAKE BASIN, N. Y. 441 



liest, April 20, 1900 and 1905. It nests through June and departs the 

 very last of August. 



292 (613). Hirundo erythrogaster Boddaert. Barn swallow. 

 Common summer resident. The average date of spring arrival 



is April 19, the earliest, April 13, 1905. This species along with 

 individuals of the preceding begin to collect in large flocks in the 

 marshes about July 15. The latest fall record is September 26, 

 1908. 



293 (614). Iridoprocne bicolor (Vieillot). Tree swallow. 

 Common summer resident and abundant during migration. The 



average date of spring arrival is April 2, the earliest, March 23, 1907. 

 Nests with eggs have been found from May 8 to June 15. It be- 

 comes abundant the last of September, suddenly disappearing about 

 October 15. In 1906 large flocks were common until October 13. 

 In 1907 numerous flocks were seen until October 12. 



294 (616). Riparia riparia (Linnaeus). Bank swallow. 

 Common summer resident. The average date of spring arrival 



is April 25, the earliest, April 14, 1906. Nesting begins May 10 and 

 lasts until June 15. The nests are found usually in gravelly or sandy 

 banks. The larger proportion of individuals leave during the first 

 week in September. Our latest record is September 26, 1908. 



295 (617). Stelgidopteryx serripennis (Audubon). Rough-winged 

 swallow. 



Common summer resident. The average date of spring arrival is 

 April 26, the earliest, April 22, 1906. Nests and eggs have been 

 found from May 10 to June 10. This species is not so partial to 

 sand and gravel banks as the preceding. They are often found nest- 

 ing in shale banks along the lake shore, in the crevices of rocks in the 

 gorges and in banks of loose earth. Frequently we find them nest- 

 ing in isolated pairs and always the colonies are smaller than those 

 of the Bank Swallow. As a rule all have left by September 10. 

 The latest date is a specimen taken September 26, 1908. 



'J2. Family BombycilliDvE. The Waxwings. 

 296(619). Bombycilla cedrorum Vieillot. Cedar waxwing. 



Common summer resident and frequently seen in small flocks 



PROC. AMER. PHIL. SOC. , XLVUI. I93 DD, PRINTED JANUARY 8, I9IO. 



