'909-] THE CAYUGA LAKE BASIN, N. Y. 409 



99. Clemmys muhlenbergii (Schoepff). Muhlenberg's tortoise. 

 For the present this species must be considered rare. Thus far 



only three specimens have been taken; one on June 15, 1877, near 

 Ithaca, and two at Junius, May 26, 1906. The specimen taken near 

 Ithaca was kept alive for a time and on July 20 deposited eggs in 

 the sand of the terrarium. 



100. Clemmys insculpta (Le Conte). Wood tortoise. 



Common throughout the basin in wooded regions along water 

 courses. 



loi. Clemmys guttata (Schneider). Spotted turtle. 



The only records of this species are from Junius in the extreme 

 northwestern portion of the basin where it is common. 



E. Class AVES. 



XXIII. Order PYGOPODES. The Diving Birds. 



■^^y. Family Colymbid^. The Grebes. 



102 (2).^^ Colymbus holboelli (Reinhardt). Holboell's grebe. 

 Not an uncommon transient during April and November. A 



few are found regularly in winter. The latest spring record for 

 tliis species in the basin is May 25, 1907. They are seldom taken at 

 the south end of the lake. 



103 (3). Colymbus auritus Linnaeus. Horned grebe. 



Common transient from April i to May 10 and occasionally 

 taken in winter. In the spring they become common about the mid- 

 dle of April and all have disappeared by May 10. They appear in 

 the fall the first of October, gradually increasing in numbers until 

 November throughout which they are common. 



104 (6). Tachybaptus podiceps (Linnaeus). Pied-billed grebe. 



A common transient and an uncommon but regular summer resi- 

 dent in the marshes at the north end of the lake. In the spring they 

 appear April i and are common throughout the month. In the fall 

 they become common the first of October and continue so until Nov- 

 ember I. The latest fall record is a young female taken Novem- 



" The number of the species m " Check-list of the American Ornitholo- 

 gists' Union." 



rROC. AMER. PHIL. SOC., XI.VIII. I93 BB, PRINTED JANUARY 7, I9IO. 



