COLD-BLOODED VERTEBRATES. 4I 



Desmognatbus fusca (Rafinesque) — Dusky Salamander. 



Abundant. The aquatic yonng may be found in most 

 spring-fed streams. Chad's Ford, Concordville, Wawa, Whet- 

 stone Run, Fawkes Run, Collar Brook, Naylor's Run, Cobb's 

 Creek. 



Diemictylus viridescens (Rafinesque) — Newt. 



I found the aquatic form of this species at Wawa. 



Bufo americanus (Holbrook) — Toad. 



Common. Chad's Ford, Wawa, Chester Heights, Trout 

 Run, Collingdale, Collar Brook, Media. 



Scaphiophus holbrookii (Harlan) — Spade-foot Toad. 



This retiring animal is rarely seen, and lives under the 

 ground during the day, coming forth mostly at night. In the 

 spawning season, during the spring, the males call vocifer- 

 ously. It is only known from Delaware County from the 

 record of Cassin by Cope.* 



Acris gryllus crepitans (Baird) — Cricket Toad. 



Common. Chad's Ford, Brandywine Summit, Concord- 

 ville, ]\Iarkhara, Chester Heights, Wawa, L,angford's Run, 

 Collingdale. 



Hyla pickeringii (Holbrook) — Pickering's Tree-toad. 



Common, especially in chorus during the Spring. Mr. 

 Palmert found it about Chester Heights. I met with it at 

 Wawa, Collingdale, Trout Run and Collar Brook. 



Hj'la versicolor (Le Conte) — Common Tree-toad. 



Abundant. I met with it at Collingdale and Wawa. 



Hyla andersonii (Baird) — Anderson's Tree-toad. 



This interesting coastal species is only known from these 



*Proc. Acad. Nat. Sci. Phila., 1867, p. 85. 



tProc. Del. Co. Inst. Sci., LV, Nov. 25, 1908, p. 20. 



