8. L^MANCTUS. 105 



larger than the eye-opening. Gular scales small, suboval, feebly 

 keeled, enlarged and hexagonal near the labials. Dorsal ridge more 

 or less strongly serrated ; scales on the body nnicarinate, smallest 

 on the sides, largest on the abdomen, 57 to 61 round the middle of 

 the body. The adpressed hind limb reaches beyond the tip of the 

 snout ; digits very long, very unctpial. Tail round, more than three 

 times as long as head and body, covered with keeled scales. Reddish 

 or purplish above (in spirit), with dark-brown bands across the 

 body, most distinct on the vertebral region ; a dark brown band 

 from the eye to the tympanum, sometimes continued along the side 

 of the back ; a whitish streak from below the eye to the fore limb, 

 and from axilla to groin ; a white spot on each side of the base of 

 the tail, close to the thigh ; lower surfaces pale purplish or greenish ; 

 tail with indistinct dark aunuli. 



Total length 010 millira. 



Head (to extremity of helmet). 47 ,, 



AYidth of head 25 „ 



Eody (from occiput) 105 ,, 



Fore limb 80 ,, 



Hind limb 140 „ 



Tail 4G0 



>» 



Southern Mexico ; Yucatan. 



rt-c. c? 2 ' Mexico. 



d. Yg. Vera Cruz. 



e. Ad., stuffed. Mexico. 



2. Laemanctus alticoronatus. 



Lsemanctus alticoronatus, Cope, Proc. Ac. Philad. 1865, p. 192, and 

 Proc. Am. Phil. Soc. 1869, pi. ii. 



Very closely allied to the preceding, differing in the larger scales 

 (45 to 51 round the middle of the body), the more elongate gulars, 

 and the less distinct vertebral serration. Pale purplish, with anas- 

 tomosing dark lines ; no white streak along the flanks, but a white 

 spot in front and another behind the thigh. 



Yucatan. 



a. $. Yucatan. 



3. Lsemanctus longipes. 



Lasmanctus longipes, Gray, Cat. p. 185. 

 Laemanctus longipes, Wicym. Ilerp. Me.r. p. 40, pi. iv. ; Dimi. S' 

 L'ibr. iv. p. 172 ; Boulcny. I. c. p. 464, pi. vii. iig. 2. 



The scales on the forehead much larger Ihan those on the back of 

 Uio head, but smaller and less regular than in L. serratus ; posterior 

 border of head angular, without projecting triangular scales. Gular 

 scales mostly bi- or tricarinate. No dorsal crest. Otherwise as in 



