522 ON THE LIZvVBDS OF THE GENUS SCELOPOEU8. [May 18, 



from the smaller entire-edged ventrals; 40 scales between the 

 interparietal shield and the base of the tail; 10 dorsal scales 

 correspond to the length of the head. 



Tibia longer than the shielded part of the head. 13 or 14 

 femoral pores on each side. 



General colour blackish above, with numerous indistinct lighter 

 cross-bars ; or hght brown with a double longitudinal series of 

 transverse black spots and a yellow dorso-lateral band ; yellowish 

 or greenish inferiorly. 



From snout to vent 68 millim. 



Hah. Colima, Mexico. 



I have not seen examples of this species. 



32. SCELOPOETJS COUCHTI. 



Sceloporus coucJiii, Baird, Proc. Ac. Philad, 1858, p. 254 ; 

 Bouleng. Cat. Liz. ii. p. 231 (1885). 



Head-shields smooth; frontal transversely divided; interparietal 

 large, as long as broad, separated from the frontal by a pair of 

 small shields ; jjarietals small, two on each side : two cantbal 

 scales ; five transversely enlarged supraoculars, bordered inwards 

 by one series of scales and separated from the supraciliaries by 

 two or three series ; four slightly enlarged, pointed scales form a 

 denticulation on the anterior border of the ear. 



Dorsal scales small, not larger than ventrals, keeled, truncate 

 or rounded behind, forming parallel longitudinal lines ; 82 scales 

 between the interparietal shield and the base of the tail ; 20 scales, 

 taken in the middle of the back, correspond to the length of the 

 shielded part of the head ; lateral scales minute, granular, much 

 smaller than dorsals and ventrals. Ventral scales smooth, entire. 

 108 scales round the middle of the body. 



The adpressed hind limb reaches the posterior border of the 

 orbit ; tibia as long as the distance between the end of the snout 

 and the ear ; 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 middle of the collar-fold. Femoral pores 17-18 

 (25 in the type). 



Caudal scales much larger than dorsals, strongly keeled and 

 shortly mucronate. Males with enlarged postanal scales. 



Dark olive above, with an interrupted bluish-white lateral stripe ; 

 sides spotted with bluish white ; a black white-edged ocellus with 

 blue centre in front of the shoulder ; lips aa hite with black vertical 

 bars. Throat white with dark blue oblique streaks converging 

 posteriorly ; breast and middle of belly white ; sides of belly blue, 

 with blackish inner edge. 



Hub. The type is from Santa Catharina, Nuevo Leon. The 

 smgle specimen I have examined, a male measuring 57 millim. 

 from snout to vent, was obtained in Duval Co., Texas, by Mr. W. 



Taylor. 



EXPLA]!^ATION OP PLATE XXXIII. 



Sceloporus asper, male, upper and under yiews. 



