486 MB. G. A. BOULENGEB, ON THE [May 18, 



the throat. Male with the throat blue, and the sides of the 

 belly blue, edged with blackish on the inner side. Female whitish 

 beneath, the throat bluish. 



Hah. North Mexico and Texas. The type is from Coahuila, 

 North Mexico. 



6. SCELOPOEUS DUGESI. 



Sceloponis ducjesii, Bocourt, Miss. Sc. Mex., Kept. p. 188, 

 pi. xviii. fig. 7 (1874); Cope, Proc. Am. Philos. Soc. xxii. 1885, 

 p. 396 ; Bouleng. Cat. Liz. ii. p. 224 (1885). 



Sceloporus intermedius, Duges, Naturaleza, iv. 1876, p. 29, pi. i. 

 figs. 21-32. 



Head-shields smooth ; frontal transversely divided, in contact 

 with the interparietal, which is as long as broad and much larger 

 than the parietals; a series of four or five feebly enlarged trans- 

 verse supraoculars, bordered inwards by one series of scales and 

 separated from the supraciliaries by one series of large scales and 

 one or two of small ones ; two canthal scales ; four pointed scales, 

 not much lai'ger than those before them, form a denticulation on 

 the anterior border of the ear. 



Dorsal scales a little larger than ventrals, broader than long, 

 feebly keeled, obtuse, not denticulated, converging towards the 

 middle line posteriorly ; 44-48 scales between the interparietal 

 shield and the base of the tail, 9 or 10 corresponding to the length of 

 the shielded part of the head. Lateral scales a little larger, keeled, 

 pointed, directed upwards and backwards. Ventral scales smooth, 

 entire or bicuspid. 52-55 scales round the middle of the body. 



The adpressed hind limb reaches the collar-fold ; tibia as long 

 as 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 ear. 12-15 femoral pores 

 on each side. 



Caudal scales larger than dorsals, strongly keeled. Males with 

 enlarged postanal scales. 



Brownish olive above, with interrupted dark cross-bands or a 

 double series of narrow dark brown spots on the vertebral region ; 

 sides with oblique light lines ; a broad, dark, light-edged scapular 

 collar ; limbs and tail with brown cross-bands. Lower surfaces 

 yellowish in the female, the throat striped with bluish. Male 

 with the throat bluish, with concentric darker lines, and the sides 

 of the belly blue, black-edged internally. 



A small species, measuring 65 millim. from snout to vent. 



Hal. Colima and Michoacan, Mexico. 



I have examined but two specimens, from La Noria, Michoacan, 

 presented to the Bi'itish Museum by Dr. A. Duges. 



7. SCELOPOEUS CONSOBBIKTJS. 



Scelopoj-us consobnnus, Baird & Gir. in Marcy's Explor. Eed 

 Eiver, p. 237, pi. x. figs. 6-12 (1853) ; Cope, in Hayden's Eep. 



