1909.] THE CAYUGA LAKE BASIN, N. Y. 449 



departs the first of September. The latest date is September lo, 

 1890. 



yd. Family Motacillid^. The Wagtails. 



335 (697). Anthus rubescens (Tunstall). Titlark. 



Common transient from April 7 to May 15 and from September 

 20 to October 20. 



jj. Family Mimidjj. The Thrashers and Mockingbirds. 



336 (704). Dumetella carolinensis (Linnsens). Catbird. 

 Common summer resident. The average date of arrival is May 



5, the earliest, April o.'j, 1908. Breeding occurs through the last 

 half of May and whole of June. The majority of individuals have 

 left in the fall by September 30 but a few are seen always during 

 the first days of October. The latest date is October 8, 1908. 



337 (705)- Toxostoma rufum (Linnaeus). Brown thrasher. 

 Common transient and an uncommon summer resident. The 



average date of arrival is May i, the earliest, April 27, 1908. The 

 migration lasts for about two weeks, ceasing as a rule about May 15. 

 A few breed regularly on South and Snyder Hills. The latest fall 

 date is October 6, 1900. 



78. Family Troglodytid^. The Wrens. 



338 (718). Thryothorus ludovicianus (Latham). Carohna wren. 

 Rare summer resident. On March 22, 1890, L. A. Fuertcs found 



a pair on the west shore of the lake about four miles north of Ithaca 

 where they bred that summer. It was not seen again until June 12, 

 1903, when a pair was found in Cascadilla gorge on the Cornell 

 campus where they remained until observations ceased about the 

 middle of August. 



339 (721)- Troglodytes aedon Vieillot. House wren. 



Common summer resident. The average date of arrival is April 

 30, the earliest, April 26, 1905 and 1906. Eggs are found from 

 May 25 to July 10. They are much reduced in numbers by the 

 middle of September and all have left by the last of the month. 

 In the southern portion of the basin .this species has increased 

 seventy-five percent in the last 10 years. 



