16 COLUBRID^. 



Drymobius percarinatus, Cope, Proc. Amer. Philos. Soc. xxxi. 1893, 

 p. 344. 



Maxillary teeth 32 to 38, posterior moderately enlarged. Rostral 

 broader than deep, visible from above ; internasals as long as or a 

 little shorter than the prsefrontals ; frontal once and a half to once 

 and three fourths as long as broad, as long as its distance from the 

 end of the snout (longer in the young), as long as or a little shorter 

 than the parietals ; loreal usually longer than deep ; one praeocular, 

 nob touching the frontal ; two or three postoculars ; temporals 

 2 + 2 ; nine (exceptionally ten) upper labials, fourth, fifth, and 

 sixth (or fifth, sixth, and seventh) entering the eye ; five (rarely 

 four) lower labials in contact with the anterior chin-shields, which 

 are shorter than the posterior. Scales more or less strongly keeled, 

 in 17 rows. Ventrals 150-167 ; anal entire or divided ; subcaudals 

 113-155. Olive-brown above, uniform or with blackish cross- 

 bands enclosing round whitish spots, or with whitish black-edged 

 cross-bands ; upper lip whitish ; ventrals and subcaudals oUve on 

 the sides, whitish, uniform or dotted or edged with olive, in the 

 middle. 



Total length 1020 millim. ; tail 420. 



From Mexico to Ecuador and the Guianas. 



a. Hgr. S (V. 160 ; 0. Mexico. M. SaU^ [C.]. 



123). 

 b-e. 2 (V. 160, 167, 160; Vera Paz, low forest. 0. Salvin, Esq. [C.]. 



0. 113, 139, 110) & 



yg. (V. 166; 0.145). 

 /. S (V. 152 ; C. 119). Guatemala. 0. Salvin, Esq. [C.]. 



ff-h.2(V.lQ0;G.128) Chiriqui. F. D. Godman, Esq. 



& yg. (V. 150; C. [P.]. 



150). 

 i. 5 (V. 156; C. ?). Guayaquil. (Type o{ H. brunneus.) 



k-m. S (V. 162, 151, W. Ecuador. Mr. Eraser [C.]. 



156; C. 117, 125,?) 



& $ (V. 157 ; C. ?). 

 n. Yg. (V. 159; 0. 140). Quito, 

 o. Yg. (V. 150; C.155). Zaruma, Ecuador. J. F. Gunter, Esq. 



p. Yg. (V. 162 ; C. 142). Venezuela. Mr. Dyson [C.]. 



q. Skull. Cayenne. 



7. Drymobius chloroticus. 



Dendrophidium chloroticum, Cope, Proc. Amer. Philos. Soc. xxiii. 



1886, p. 278. 

 Drymobius chloroticus, Cope, Bull. U.S. Nat. Mus. no. 32, 1887, 



p. 69; Bocourt, Miss. Sc. Mex., Rept. p. 718, pi. 1. fig. 7 (1890). 

 brunneus (non Giintk.}, Bocourt, I. c. pi. 1. tig. 6. 



Maxillary teeth not more than 25, posterior rather strongly 

 enlarged. Rostral broader than deep, visible from above ; inter- 

 nasals shorter than the priefrontals ; frontal hardly once and a half 

 as long as broad, as long as its distance from the end of the snout, 

 a little shorter than the parietals ; loreal uot or but slightly longer 



