520 



MR. G. A. EOULENGER, OK THE 



[May 18, 



from the supraciliaries by oue or two series ; two canthal scales ; 

 three or four obtusely pointed scales form a feeble denticulation 

 on the anterior border of the ear. Lateral cervical fold forming a 

 deep pouch. 



Dorsal scales very strongly keeled, pointed or shortly mucronate, 

 forming 8 to 10 straight or slightly oblique longitudinal series ; 

 34-44 scales between the interparietal shield and the base of the 

 tail, 6-9 corresponding to the length of the shielded part of the 

 head. Lateral scales much smaller, abruptly differentiated from 

 dorsals, keeled, imbricate, directed obliquely upwards and back- 

 wards. Ventral scales as large as laterals or a little larger, smooth, 

 entire. 36-44 scales round the middle of the body. 



The adpressed hind limb reaches the ear, the eye, or the nostril ; 

 tibia a little longer than the shielded part of the head ; the 

 distance between the base of the fifth toe and the extremity of 

 the fourth equals the distance between the nostril and the arm, or 

 a little less. 3-8 femoral pores on each side. 



Caudal scales as large as dorsals, strongly keeled, shortly 

 mucronate. No enlarged postanal scales. 



Olive-brown above, with coppery gloss ; sides darker, sometimes 

 blackish ; a yellowish dorso-lateral streak frequently separates the 

 dorsal from the lateral surfaces ; a series of oblique blackish cross- 

 lines along each side of the back. Lower surfaces uniform yellowish 

 in both sexes, or finely speckled with blackish in the males. 



Hah. Isthmus of Tehuantepec. 



29. SCELOPOEtJS PTJLTUS. 



Sceloporus fulvus, Bocourt, Miss. Sc. Mex., Eept. p. 214, pi. xviii. 

 bis, fig. 8 (1874) ; Bouleng. Cat. Liz. ii. p. 238 (1885). 



Head-shields feebly keeled or striated, sometimes nearly smooth; 

 frontal divided into four small shields separated from the inter- 

 parietal by a pair of frontoparietals ; interparietal as long as broad ; 

 parietals small, two on each side ; a series of four or five large 

 transverse supraoculars, bordered inwards by one series of small 

 scales and separated from the supraciliaries by one or two series ; 



