Natural History of District of Columbia — MdAtee 45 



toad, a species more perfectly understood now than then, 

 and the spotted salamander. Three turtles also have been 

 added, one of which, the northern wood tortoise (Clemmys 

 insculpta ) , has been collected several times near Plummers 

 Island, Md. The name of one snake is removed, the form 

 being Xatrix hisccta of Cope, which as Dr. Hay states was 

 founded on an abnormal and unique specimen. This type 

 specimen was collected in Washington, and the material 

 upon which a species of tree frog. Hi/la criftata, was de- 

 scribed by Gerrit S. Miller was obtained nearby at Four-mile 

 Run, Va. 



Only two of the species of snakes rei)orted are venomous, 

 namely : the copperhead and the rattlesnake. The former is 

 common, but the latter apparently is extinct. Warden 

 recorded -* it in 1816. The species here verging on their 

 northern limit are the mud eel (Siren lacerti na ) , Holbrook's 

 salamander fSpelerpes guttolineatus ) , the brown-back lizard 

 (Lygosoma laterale), the six-lined lizard fCnemidophoriis 

 sexlincntus), the spotted racer fCaUopettis guttatus), scar- 

 let snake fCemophora coccinea), and the keeled green snake 

 fCyclophis aestivus). Species venturing little beyond the 

 Piedmont Plateau are tlie long-tailed triton (Spelerpes 

 longicaudus), brown triton (Desmognatlms fusca), and the 

 Allegheny blacksnake (Callopeltis obsoletus), while the dia- 

 mond back terrapin (Malaclemrnys centrata) and the two 

 turtles mentioned in the last item of the following bibliog 

 raphy belong to the coastal plain fauna. Whether the north- 

 ern wood-tortoise (Clemmys insculpta) and the Jefferson 

 Salamander (Antbystoma jcffersonianwm fusciim) should also 

 be considered as highland species or whether they exist here 

 merely on the southern fringe of a more general range is 

 uncertain. 



BIBLIOGRAPHY. 

 Fisher, A. K. 



Spelerpes guttolineatus Holbrook, in the vicinity of Washington, 

 D. C. 



Am. Nat. 21, No. 7, July, 1887, p. 672. 



This and 4 other species captured near Munson Hill, Va. 



-♦Warden, D. B. — A chorographical and statistical description of the 

 District of Columbia, 1816, p. 13. 



