220 



COI.UBEID^. 



deep, visible from above ; internasals not more than half as long as 

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

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

 broad, as long as or longer than its distance from the end of the 

 Bnout, shorter than the parietals ; nostril between two nasals, the 

 posterior very small and widely separated from the prseocular ; two 

 postooulars ; 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 143-180 ; anal divided ; subcaudals 50-72. 

 Whitish above, with large black spots or irregular cross-bands, or 

 with two broad black stripes separated by a white vertebral line, or 

 blackish, with whitish cross-bands ; end of snout whitish ; a white 

 occipital cross-bar, usually interrupted in the middle ; lower parts 

 white. 



Total length 470 miUim. ; tail 80. 



Venezuela, Colombia, Ecuador. 



a~c. 2 (V. 159; 0. ?). Colombia. Dr. J. G. Fischer. 



& jg. (V. 180, 168 ; 

 0. 50, 57). 



d. 2 (V. 168 ; 0. ?). Carthagena. Capt. Garth [P.]. 



(Type of H. laticeps.) 



e. 2 (V. 166 ; 0. ?). Eosario de Cucuta. Mr. C. Webber [C.]. 



8. Homalocraninm fnscuin. 



Homalocranium melanocephalum, part., Jan, Arch. Zool. Anat. Phys. 



ii. 1862, p. 51, and Icon. O^n. 15, pi. ii. fig. 4 (1866) ; Oilnth. 



Biol. C.-Am., Sept. p. 147 (1895). 

 melanocephalum, var. fuscum, Bocourt, Miss. 8c. Mex., Sept. 



p. 689 (1883). 



jani, Gunth. I. c. p. 148, pi. Hi. fig. D. 



armillatum, part., GUnth. I. c. p. 149. 



Eye not half as long as the snout. Rostral a little broader than 

 deep, visible from above ; internasals about half as long as the 

 prsefrontals ; frontal hexagonal, obtuse-angled in front, acute- 

 angled behind, once and one third as long as broad, longer than its 

 distance from the end of the snout, shorter than the parietals ; 

 nostril between two nasals, the posterior of which is in contact 

 with or separated from the praeocular ; two postoculars ; temporals 

 1 -|- 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 136-159 ; 

 anal divided ; subcaudals 44—49. Brown above, with or without 

 a light, dark-edged lateral line, with or without a blackish vertebral 

 line ; head dark brown or blackish above, with yellow markings as 

 in H. melanocephalum,. 



Total length 245 millim. ; taU 50. 



Guatemala, Nicaragua. 



