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Show Sl8 MR. G. A. BOULENGER ON THE [May 18, interparietal shield and the base of the tail, 10-17 corresponding to the length of the shielded part of the head. Lateral scales much smaller, abruptly differentiated from dorsals, keeled, imbricate, directed obliquely upwards and backwards. Ventral scales as large as laterals or a little larger, smooth, mostly bicuspid. 56-78 scales round the middle of the body. The adpressed hind limb reaches the ear or the eye; tibia as long as or a little 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 arm and the nostril or a little less. 10-16 femoral pores on each side. Caudal scales as large as or a little larger than dorsals, strongly keeled, shortly mucronate. Males with enlarged postanal scales. Olive, brownish, or golden above, sides darker; a more or less distinct yellowish dorso-lateral band; a series of transverse blackish bars or spots along each side of the back ; a blackish spot, light-edged in front, above axilla. Lower parts yellowish or dirty white in the female. Male with a large pink or pale blue blotch on each side of the belly, edged internally with dark blue and often very narrowly separated on the median line; throat and breast sometimes dark grey. Hab. The greater part of Mexico and Guatemala, extending northwards into Southern Texas. 27. SCELOPORUS CUPREUS. Sceloporus cupreus, Bocourt, Miss. Sc. Mex., Eept. p. 210, pl. xviii. bis, fig. 2 (1874). Sceloporus teapensls, Giinth. Biol. C.-Am., Eept. p. 75 (1890). Head-shields keeled or striated; frontal transversely divided, sometimes longitudinally bisected, separated from the interparietal by a pair of frontoparietals; interparietal broader than long; parietals small or broken up into scales; a series of four or five large transverse supraoculars, bordered inwards by a complete or - incomplete series of small scales and separated from the supraciliaries by one or two series; two canthal scales ; anterior border of ear very feebly denticulated. Ten or eleven longitudinal series of large, strongly keeled, shortly mucronate dorsal scales, forming straight or slightly oblique longitudinal series ; 39-43 scales between the interparietal shield and the base of the tail, 8 or 9 corresponding to the length of the shielded part of the head. Lateral scales much smaller, keeled, directed upwards and backwards, abruptly differentiated from the dorsals. Ventral scales small, smooth, mostly bicuspid. 40-46 scales round the middle of the body. The adpressed hind limb reaches the ear or the eye; 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 anterior extremity or the middle of the collar-fold. 9-14 femoral pores on each side. |