Natural History of District of Columbia — McAtee 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 bisecta 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. Hyla evittata, was de- 

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

 Run, Va. 



Only two of the species of snakes reported are venomous, 

 namely: the copperhead and the rattlesnake. The former is 

 common, but the latter apparently is extinct. Warden 

 recorded 24 it in 1816. The species here verging on their 

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

 salamander (Spelerpes guttolineatus) , the brown-back lizard 

 (Lygosoma laterale), the six-lined lizard (Cnemidophorus 

 sexlincatus), the spotted racer fCallopettis guttatus), scar- 

 let snake (Cemophora coccinea), and the keeled green snake 

 (Cyclophis aestivus). Species venturing little beyond the 

 Piedmont Plateau are the long-tailed triton (Spelerpes 

 longlcaudus), brown triton (Desmognathus fusca), and the 

 Allegheny blacksnake (Callopeltis obsoletus), while the dia- 

 mond back terrapin (Mala clemmys 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 ( Ambystoma jeffersonianum fuscum) 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. 



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

 District of Columbia, 1816, p. 13. 



