162 ENGTSTOIIATID^. 



a-b. S 2 • Tehiiantepec. Brussels Museum [E.J. 



c-d. Hgr. Cordova. M. Salle [C.]. 



e. 5 . Mexico. M. Salle [C.]. 



f, g. 2 & hgr. Mexico. 



2. Engystoma carolinense. 



Engystoma carolinense, part., Gunth. Cat. p. 51. 

 Engystoma caroliuense, Holhr. N.-Amer. Herp. i. p. 83, pi. 2 ; Dum. 

 i^Bibr. p. 743 ; Hallow. Proc. Ac. Philad. 18o6, p. 251. 



olivaceum, Halloiv. I. c. 



texense, Girard, Proc. Ac. Philad. 1859, p. 169. 



Snout rather obtuse, slightly projecting, not twice as long as the 

 diameter of the eye. Fore limb considerably longer than its distance 

 from the tip of the snout. The hind limb being carried forwards 

 along the body, the tibio-tarsal articulation reaches the shoulder in 

 the female, a little beyond in the male. Toes quite free, with blunt 

 tips and distinct subarticular tubercles ; a very small inner meta- 

 tarsal tubercle ; no outer tubercle. Skin smooth ; a fold across the 

 head, behind the eyes. Brown, dotted with lighter beneath. Male 

 with a subgular vocal sac. 



S.E. li. America. 



a-b, c. S , 2 , ^ hgr. New Orleans. 



d. cJ • -N. America. Edward Doubleday, Esq. [P.], 



3. Engystoma elegans. 



Engystoma carolinense, part., Giinth. Cat. p. 51. 



Snout pointed, projecting, twice as long as the diameter of the ej'e. 

 Fore limb considerably longer than its distance from the tip of the 

 snout. The hind limb being carried forwards along the body, the 

 tibio-tarsal articulation reaches in front of the shoulder ; toes quite 

 free, with blunt tips and distinct subarticular tubercles ; a very 

 small, very indistinct, inner metatarsal tubercle ; no outer tubercle. 

 Skin perfectly smooth ; a fold across the head, behind the eyes. 

 Light brown above ; back with an irregular broad dark band ; sides 

 of head and body dark brown ; hip with a round dark-brown spot ; 

 thigh, leg, and tarsus each with a broad dark-edged cross band ; belly 

 marbled with brown ; throat brown, marbled with whitish. 



In coloration this species resembles i?. us<(«??i, from which it differs 

 in having a single, hardly distinct, metatarsal tubercle. Prom 

 E. ovale it differs in the longer hind limbs ; and from E. carolinense 

 in the latter character and in the longer, more pointed snout. 



Mexico. 



a. $ . Cordova. M. Salle [C.]. 



