16 



COLUBRIDJE. 



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 praefrontals ; 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, 

 not 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 olive 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. d (V. 160 ; 0. 



123). 

 6-e.$(V. 160, 167,160; 



C. 113, 139, 116) & 



yg.(V. 166; 0.146). 

 /. rf (V.152; C. 119). 

 ff-h. $(V. 160; 0.128) 



& yg. (V. 150; C. 



150). 



t. $ (V. 156 ; C. P). 

 k-m. rf (V. 162, 151, 



156; C. 117, 125,?) 



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

 n.Yg.(V. 169; 0.140). 

 o.Yg. (V. 160; 0.165). 



/.Yg.(V. 162; 0.142). 

 5. Skull. 



Mexico. 



Vera Paz, low forest. 



Guatemala. 

 Chiriqui. 



Guayaquil. 

 W. Ecuador. 



Quito. 



Zaruma, Ecuador. 



Venezuela. 

 Cayenne. 



M. Sall<$ [C.]. 



O. Salvin, Esq. [C.]. 



0. Salvin, Esq. [C.]. 

 F. D. Godman, Esq. 



[P.]. 



(Type of H. brunneus.) 

 Mr. Fraser [C.]. 



J. F. Gunter, Esq. 



[01. 

 Mr. Dyson [C.]. 



7. Drymobius cMoroticns. 



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., Kept. p. 718, pi. 1. fig. 7 (1890). 

 brunneus (non Qunth.), Bocourt, 1. c. pi. 1. fig. 6. 



Maxillary teeth not more than 25, posterior rather strongly 

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

 nasals shorter than the prsefrontals ; 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 not or but slightly longer 



