Region Studied and Methods Pursued. 3 



Coincident with this out-of-door method, a parallel study was 

 attempted in the laboratory. In almost every species mated pairs cap- 

 tured afield were isolated. The eggs from these captive pairs were 

 taken through hatching and in some cases almost to transformation. 



Very good results were also obtained from night-collecting and studj^ 

 with an electric flash-lamp. With this apparatus the capture of mated 

 pairs was facilitated and many interesting observations upon the 

 breeding-season conduct were recorded. The water-photographs of the 

 series of each species, egg-areas, tadpoles, etc., were taken from live 

 specimens. The measurements and characters of the eggs, tadpoles, 

 and transformed individuals were based upon a large series of speci- 

 mens, both living and preserved. 



A CATALOGUE OF THE ITHACAN ANURA.* 



The Anura of Ithaca include 8 species, representing 3 genera. These 

 are Bufo, Hyla, and Rana. 



Bufo lentiginosus americanus (LeConte). The Gammon Toad. This terres- 

 trial species is abundant, being found in almost every locality where 

 sufficient cover exists for hiding during the day. Only at the 

 breeding season are they found in the water. 



ffi/if pickeringii Holbrook. The Peeper. In the spring it is common in 

 ponds and marshes; thereafter, it is seldom seen while in the woods 

 and upon the trees. 



Hula versi color LeConte. The Tree-toad. This common species is general 

 in its distribution, both at the breeding season and later, when in 

 the woods and among the trees. 



Rana pipiens Schreber. The Leopard- or Meadow-frog. This very abundant 

 and swamp-loving form, after the breeding season, is commonly 

 found in the meadow-lands. 



Rana palustris LeConte. The Pickerel-frog. This common species is fre- 

 quent in the spring in the upland ponds and streams, though not 

 uncommon in the marshy lowlands. In summer it is found in the 

 moist meadows. 



Rana clamata Latreille. The Green-frog. This aquatic frog is abundant, 

 inhabiting many more diverse localities than its close relative, the 

 bullfrog. 



Rana catesbeiana Shaw. The Bullfrog. This, our least common Anuran, is 

 strictly aquatic, preferring swamps, large ponds, or marshy streams. 



Rana sylvatica. LeConte. The Wood-frog. This species, common in the 

 moist woods, generally seeks shaded woodland pools or ponds for 

 breeding. 



*For detailed descriptions of the adult forms, consult E. D. Cope, Batrachia of North 

 America (1889), Bull. U. S. Nat. Museum Xo. 34; for illustrations compare the excellent 

 photographs in ''The Frog Book," by Miss M. C. Dickerson. 



