OCR Text |
Show 504 MR. G. A. BOULENGER ON THE [May 18, Sceloporus occidentalis, Baird & Gir. 1. c. p. 175; Girard, 1. c. p. 383, pl. xix. figs. 8-14; Stejneger, N . A m . Eaun. no. 7, 1893 p. 186. Sceloporus frontalis, Baird & Gir. 1. c.; Gir. 1. c. p. 384, pl. xix figs. 8-14. Sceloporus longipes, Baird, Proc. Ac. Philad. 1858, p. 254. Sceloporus hlserlatus, Hallow. Eep. U.S. Explor. Surv. E. E. x. pt. iv. p. 6, pl. vi. fig. 2 & pl. viii. (1859) ; Bocourt, 1. c. p. 197, pl. xviii. bis, fig. 10 ; Cope, Proc. Amer. Philos. Soc. xxii. 1885, p. 395; Stejneger, 1. c. p. 184. Sceloporus smaragdinus (non Bocourt), Cope, in Wheeler's Eep. Explor. W . 100th Mer. v. p. 572, pl. xxiv. fig. 2 (1875). Sceloporus undulatus, var. bocourtll, Bouleng. 1. c. p. 229. Some or all of the head-shields more or less rugose, rarely smooth, the scales between the enlarged supraoculars and the supraciliaries nearly constantly keeled or tuberculate; frontal transversely divided, usually in contact with the interparietal; latter as long as broad, a little longer than broad, or a little broader than long, much larger than the parietals, which may be divided; a series of four or five more or less enlarged, transverse supraoculars, bordered inwards by a complete (rarely incomplete) series of scales and separated from the supraciliaries by one or two series ; two canthal scales (rarely one); four or five pointed scales, as large as or larger than those before them, form a denticulation on the anterior border of the ear. Dorsal scales much larger than ventrals, as long as broad or a little broader than long, strongly keeled, rather strongly mucronate, entire or feebly denticulate, the keels forming parallel lines or obliquely converging towards the middle line on the posterior part of the back; 32-43 scales between the interparietal shield and the base of the tail; 7-9 (exceptionally 10) scales, taken in the middle of the back, correspond to the length of the shielded part of the head. Lateral scales graduating into dorsals and ventrals, keeled, pointing upwards and backwards. Ventral scales small, smooth, bicuspid. 36-48 scales round the middle of the body. The adpressed hind limb reaches the shoulder, the collar-fold, or the ear; 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 or slightly exceeds the distance between the end of the snout and the collar-fold. 13-19 femoral pores on each side. Caudal scales as large as or a little larger than dorsals, strongly keeled and mucronate. Males with enlarged postanal scales. The typical form, inhabiting the Eastern and Central United States and the border of the Gulf of Mexico, is grey, brown, or copper-colour above, with a dorso-lateral series of whitish or bluish spots or lateral bands crossed by transverse dark brown or black angular spots, or undulous or zigzag cross-bars, which may extend across the back. In males, the sides of the belly are blue or blue-green, edged with black along a whitish stripe which |