238 IGUANID-E. 



23. Sceloporus Mvus *. 



Sceloporiis fulvus, Bocourt, Miss. Sc. Me.v., Rept. p. 214, pi. xviii. 

 bis, tig. 8. 



Head-shields keeled or striated ; one canthal scale ; a series of 

 four or five large transverse supraoculars ; occipital as long as broad ; 

 parietals much smaller, two on each side ; anterior border of ear 

 very slightly denticulated. Lateral cervical fold forming a deep 

 pouch. Dorsal scales much larger than ventrals, strongly keeled, 

 sharply pointed, forming eight parallel longitudinal series ; thirty 

 to thirty-two scales between the occipital and the base of the tail ; 

 seven or eight scales correspond to the length of the shielded part 

 of the head ; lateral scales smaller, slightly larger than ventrals, 

 keeled, directed obliquely upwards ; ventrals obtusely keeled, pointed, 

 not emarginate ; thirty-eight to forty 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. Three or four 

 (or five) femoral pores. Tail long ; caudal scales nearly as large as 

 dorsals. No enlarged postanal scales. Fulvous above, sides dark 

 brown ; a yellow dorso-latcral band separating the dorsal from the 

 lateral surfaces ; a more or less distinct series of oblique dark-brown 

 spots along each side of the back ; lower surfaces uniform yellowish 

 in both sexes. 



24. Sceloporus squamosus. 



Sceloporus squamosus, Bocourt, Miss. Sc. Mex., Re-pt. p. 212, pis. xviii. 

 bis. fig. 7, and xix. fig. 3 \ Cope, Proc. Am. Fhilos. Sac. xxii. 1885, 

 p. 394. 



Differs from S. sinifervs and fulvus bj' 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 a keel on the 

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

 over with grey. 



Guatemala to Costa Eica. 



25. Sceloporus utiformis. 



Sceloporus utiformis. Cope, Proc. Ac. Phi/ad. 1864, p. 177 ; Bocourt, 

 Miss. Sc. Mex., liept. p. 208, pi. xviii. bis. fig. 6 ; Cope, Proc. Am. 

 Philos. Soc. xxii. 1885, p. 394. 



* Described from specimens from Nicaragua, in M. Lataste's collection. 



