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Show 486 MR. G. A. BOULENGER 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. Eemale whitish beneath, the throat bluish. Hab. North Mexico and Texas. The type is from Coahuila, North Mexico. 6. SCELOPORUS DTJGESI. Sceloporus dugesll, Bocourt, Miss. Sc. Mex., Bept. p. 188, pl. xviii. fig. 7 (1874); Cope, Proc. A m . Philos. Soc. xxii. 1885, p. 396 ; Bouleng. Cat. Liz. ii. p. 224 (1885). Sceloporus intermedius, Duges, Naturaleza, iv. 1876, p. 29, pl. 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 transverse 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 larger 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 wdth 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 wdth 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. Hab. Colima and Michoacan, Mexico. I have examined but two specimens, from La Noria, Michoacan, presented to the British Museum by Dr. A. Duges. 7. SCELOPORUS CONSOBRINUS. Sceloporus consobrinus, Baird & Gir. in Marcy's Explor. Bed Eiver, p. 237, pl. x. figs. 5-12 (1853); Cope, in Hayden's Eep. |