216 



COLTJBEID^. 



the praefrontals ; frontal hexagonal, obtuse-angled in front, acute- 

 angled behind, once and one third to once and . a half as long as 

 broad, longer than its distance from the end of the snout, shorter 

 than the parietals ; nostril between two nasals (which may be 

 fused), the posterior of which is in contact with or more or less 

 widely separated from the prseocular ; two postoculars ; temporals 

 1 -I- 1 ; seven upper labials, third and fourth entering the eye ; first 

 lower labial in contact with its fellow behind the symphysial ; four 

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

 longer than the posterior. Scales in 15 rows. Ventrals 133-171 ; 

 anal divided ; subcaudals 46-71. Eed or pale brown above, with 

 or without three or five more or less dark longitudinal lines ; head 

 and nape dark brown or black, with the sides of the snout and the 

 lip behind the eye yeUow; occiput with two more or less distinct 

 yellow spots or a yellow cross-bar ; lower parts uniform yellowish 

 white. 



Total length 500 millim. ; taU 100. 



Central and Tropical South America. 



a. Hgr. (V. 171 ; C. 52). 



b. t? (V. 161 ; C. 68). 



c. 2 (V. 158; 0.?). 



d. d (V. 142 ; 0. 58). 

 e-ff, h. c? (V. 187, 140 



C. 65, 68), ? CV. 136 

 0. F), & yg. (V. 142 

 0. 52). 

 i. 2 (V. 145 ; 0. ?). 



k. 2 (V. 144; C. 46). 

 I. d (V. 135 ; C. ?). 



m. ? (V. 136; C. 47). 

 n. 2 (V. 139; 0.49). 



o. Hgr. (V. 133 ; C. 48). 



p-g. S (V. 146, 149; C. 



60?). 

 r,s,t. S (V.Ud; 0.63) 



& $ (V.164, 150;0.?, 



62). 



«. Hgr. (V. 157 ; 0. 68). 

 V. 2 (V. 168; 0.52). 



Cartage, Costa Rica. 

 Tobago. 



W. Indies. 



Berbice. 



Para. 



Pemambuco. 



Asuncion, Paraguay. 

 Palmeira, Parana. 



Charobamba, Bolivia. 

 Moyobamba, N.E. 



Peru. 

 Sarayacu, N.E. Peru. 



Quito. 



W. Ecuad'or. 



W. J. A. Ludlow, 



Esq. [P.]. 

 Col. Held [P.]. 



W. A. Forbes, Esq. 



[P.]. (Typeofvar. 



pernambucense.) 

 Dr. J. BoUs [0.1. 

 Dr. S.F.Grillo[0.]; 



Marquis G. Doria 



[P.]. 



Mr.A. H. Iloff[0.]. 



Mr. W. Davis [0.1; 

 Messrs.Veitch[Pr]. 



Mr. Eraser [0, 



A 



S. America. 

 Mexico (?). 



(Types of -vax. fraseri) 

 E.Laforest,Esq.[P.]. 

 M. Sall6 [C.]. (?) 

 (Type of JE. mexicanus.) 



The latter specimen agrees so completely with Ecuador specimens, 

 that I cannot refer it to a distinct species although the nasal shield 

 is single. — The specimen is probably not from M. Salle's Mexican 

 Collection. 



