168 IQVASIDM. 



green above, darker on the sides, with a more or less distinct lighter 

 dorso-lateral streak; back usixally with angular black markings, 

 pointing backwards ; a black collar or two large black spots under 

 the neck ; throat and belly rose-coloured ; chest yellow. 



millim. millim. 



Total length 210 Fore limb 35 



Head 19 Hind limb 62 



Width of head 14 Tail 145 



Body 46 



Ecuador. 



a-f. (S , hgr., & yg. W. Ecuador. Mr. Eraser [C.]. (Types.) 



11. Liocephalus erythrogaster. 



Brachysaurus erythrogaster, Ilalloio. Proc. Ac. Philad. 1856, p. 232. 



Upper head-scales large, unicarinate : nostril superior ; four or 

 five large transverse supraoculars. Xeck slightly folded upon its 

 sides. Dorsal crest low. Scales upon back, sides, and abdomen 

 large, broader than long, strongly keeled. Tail cyclo-tetragonal at 

 the base. Head, back, and extremities brownish ; beneath of the 

 same colour, except upon chin and throat and sides of abdomen, 

 which are of a beautiful pink-red colour. 



From snout to vent 60 millim. 



Colombia. 



12. Liocephalus forinosus. 

 Liocephalus formosus, Bouleng. Bull, Soc. Zool. France, 1880, p. 43. 



Upper head-scales small, convex, smooth ; four transversely dilated 

 supraoculars. Sides of neck strongly plicate. Dorsal crest a slight 

 ridge. Dorsal scales rather large, the keels directed obliquely 

 towards the vertebral line ; ventrals as large as dorsals, smooth. 

 Tail roundish. Dark olive above, with a few large black spots on 

 the sides of the vertebral line and across the tail ; throat black ; 

 chest, flanks, and limbs interiorly metallic blue-green ; belly greyish. 



13. Liocephalus ornatus. (Plate XII.) 



Liocephalus ornatus, Gi-ai/, Cat. p. 219. 

 Liocephalus ornatus, Cope, Proc. Ac. Philad. 1868, p. 121. 



Upper head-scales small, keeled or striated ; nasal separated from 



