1897.] LIZARDS OF THE GENUS SCELOPOTIUS. 521 



a single canthal scale ; anterior border of ear very slightly denti- 

 culated. Lateral cervical fold forming a deep pouch. 



Dorsal scales much larger than ventrals, strongly keeled, sharply 

 pointed, forming eight or nine parallel longitudinal series ; 30-33 

 scales between the interparietal shield and the base of the tail, 7 

 or 8 corresponding to the length of the shielded part of the head. 

 Lateral scales smaller, slightly larger than ventrals, keeled, 

 obliquely directed upwards and backwards, sharply differentiated 

 from the dorsals. Ventral scales obtusely keeled, pointed, entire. 

 38-40 scales round the middle of the body. 



The adpressed hind limb reaches the eye ; tibia 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 end of the snout and the cervical pouch. 3-5 femoral 

 pores on each side. 



Caudal scales nearly as large as dorsals, strongly keeled. No 

 enlarged postanal scales. 



Fulvous above, sides dark brown ; a yellow dorso-lateral band 

 separating the dorsal from the lateral surfaces ; a more or less 

 distinct series of obUque dark-brown spots along each side of the 

 back. Lower parts uniform yellowish in both sexes. 



Hah. Salvador, Nicaragua. 



The two specimens examined by me form part of M. Lataste's 

 collection. 



30. SCELOPOBUS SQUAMOSTJS. 



Sceloporus squamosus, Bocourt, Miss. Sc. Mex., Eept. p. 212, 

 pi. xviii. bis, fig. 7, and xix. fig. 3 (1874) ; Cope, Proc. Am. Philos. 

 Soc. xxii. 1885, p. 394 ; Bouleng. Cat. Liz. ii. p. 238 (1885). 



Differs from S. siniferus and fulviis by the presence, in the male, 

 of enlarged postanal scales : from the former, by the presence of a 

 single canthal scale ; from the latter by the absence of keels on 

 the ventral scales. Lower surfaces, in both sexes, yellowish, dotted 

 all over with grey. 



Eab. Guatemala to Costa Rica. 



This species is a desideratum in the British Museum. 



31. ScELOPORirS TJTIFOEMIS. 



Sceloporus utiformis, Cope, Proc. Ac. Philad. 1864, p. 177 ; 

 Bocourt, Miss. Sc. Mex., Eept. p. 208, pi. xviii. bis, fig. 6 (1874); 

 Cope, Proc. Am. Philos. Soc. xxii. 1885, p. 394 ; Bouleng. Cat. 

 Li^. ii. p. 238 (1885). 



Head-shields keeled or striated ; frontal transversely divided ; 

 interparietal as long as broad ; parietals very small ; a series of 

 five or six large transverse supraoculars, bordered inwards by a 

 series of small scales, and separated from the supraciliaries by two 

 or three series ; two canthal scales ; anterior border of ear very 

 slightly denticulated. Sides of neck strongly plicate, minutely 

 granular. 



Ten longitudinal rows of large, highly keeled, shortly mucronate 

 dorsal scales, separated by many lateral series of minute flat scales 



