2Q. LIOCEPHALUS. 169 



the rostral ; no largo supraoculars. Sides of neck not plicate, 

 covered with jjointed, imbricate, keeled scales. A well-developed 

 dorsal crest. Dorsal scales large, strongly mucronate, strongly 

 keeled, the keels forming continuous straight longitudinal lines ; 

 laterals and ventrals a little smaller ; latter smooth ; forty-three 

 scales round the middle of the body. Gular scales as largo as 

 dorsals. The adpressed hind limb reaches the eye. Tail strongly 

 compressed, the crest not quite as much developed as the dorsal. 

 Olive above, with ill-defined darker spots ; a large black spot on the 

 shoulder ; throat and breast greenish ; chin and belly black. 



millirn. millim. 



Total length 235 Fore limb 37 



Head 19 Hind limb 59 



Width of head .... 14 Tail 155 



Body 61 



Ecuador. 



«• 6- Guayaquil. (Type.) 



14. Liocephalus trachycephalus. 



Ilolotropis trachycephalus, A. JDum. Cat. Meth. Sept. p. 70, and 

 Arch. Mus. viii. p. 530, pi. xxiii. fig. 1, 



Upper head-scales small, unicarinate ; nasal separated from the 

 rostral ; no Lirge supraoculars ; no distinct deuticulation on the 

 anterior border of the ear. Sides of neck not distinctly plicate, 

 covered with pointed, imbricate, keeled scales. Dorsal crest a low 

 serrated ridge. Dorsal scales moderately large, scarcely mucronate, 

 strongly keeled, the keels forming continuous straight longitudinal 

 lines ; laterals a little smaller ; ventrals nearly as large as dorsals, 

 rhomboidal, smooth ; forty-seven scales round the middle of the 

 body. Gular scales smaller than dorsals. The adpressed hind limb 

 reaches the ear. Tail moderately compressed, with slightly serrated 

 ridge. Bronze-olive above, metallic green inferiorly ; belly and a 

 band across the throat black. 



millim. millim. 



Total length 241 Fore limb 34 



Head 17 Hind limb 54 



Width of head 12 Tail 165 



Body 59 



Colombia. 



a. 6- Bogota. 



15. Liocephalus guentheri. (Plate XIII.) 



Liocephalus ornatus, {non Gray) Giinth. Proc. Zool. Soc. 1859, p. 408, 



tracliycephalus, (non A. Bum.), O'Shmujhn. Froc. Zool. Soc. 



1881, p. 244 ; Bouleng. Ann. Sf Mag. N. H. (5) ix. 1882, p. 458. 



Upper head-scales small, unicarinate ; nasal separated from the 



