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Show 1897.] LIZARDS OF T H E GENUS SCELOPORUS. 477 B. Tail strongly compressed ; head-shields smooth. 22. S. pyrrhocephalus, Cope. C. Tail cylindrical; hind limb reaching beyond the eye; bead-shields keeled or striated 23. 8. chrysostictus, Cope. II. Lateral scales longitudinal or nearly so; series of femoral pores more or less narrowly separated, often meeting on the praeanal region; head-shields keeled or striated. Tibia shorter than the shielded part of tbe head. 24. 8. ceneus, Wiegm. Tibia at least as long as the shielded part of the head. 25. 8. scalaris, Wiegm. III. Lateral scales much smaller than, and abruptly differentiated from, the dorsals. A. Lateral scales squamous, imbricate. 1. 9-16 femoral pores on each side. 46-65 scales between the interparietal shield and the base of the tail, 10-17 correspondiug to the length of the shielded part of the head. 26. S. variabilis, Wiegm. 39-43 scales between the interparietal shield and the base of the tail, 8-9 corresponding to the length of the shielded part of the head. 27. 8. cupreus, Bocourt. 2. 3-8 femoral pores on eacb side; 30-40 scales between the interparietal shield and the base of the tail. Two canthal scales; ventral scales smooth; male without enlarged postanal scales 28. 8. siniferus, Cope. One canthal scale; ventral scales obtusely keeled ; male without enlarged postanal scales 29. S.fulvus, Bocourt. One canthal scale; ventral scales smooth; male with enlarged postanal scales. 30. 8. squamosus, Bocourt. B. Lateral scales minute, granular. Head-shields keeled or striated ; 40 scales between the interparietal shield and the base of the tail; 13-14 femoral pores on each side. 31. 8. utiformis, Cope. Head-shields smooth; 82 scales between the interparietal shield and tbe base of the tail; 17-25 femoral pores on each side ... 32. S. couchii, Baird. 1. SCELOPORUS TORQUATUS. Sceloporus torquatus, Wiegm. Isis, 1828, p. 369, and Herp. Mex. p. 49, pl. vii. fig. 1 (1834); Bocourt, Miss. Sc. Mex., Bept. p. 171, pl. xviii. fig. 9 (1874); Cope, Proc. Amer. Philos. Soc. xxii. 1885, pp. 169 & 401; Bouleng. Cat. Liz. ii. p. 219 (1885); Duges, La Naturaleza, (2) i. 1888, p. 113 : Giinth. Biol. C.-Am., Eept. p. 66 (1890). Agama torquata, Green & Peale, Journ. Ac. Philad. vi. 1830, p. 231. Tropldolepls torquatus, Gray, Griff. A. K. ix. Syn. p. 43 (1831), and Zool. Beechey's Voy. p. 95, pl. xxx. fig. 2 (1839) ; Dum. & Bibr. Erp. Gen. iv. p. 301 (1837); Gray, Cat. Liz. p. 208 (1845). Sceloporus polnsettll, Baird & Gir. Proc. Ac. Philad. 1852, p. 126, and U.S. Mex. Bound. Surv., Rept. pl. xxix, figs. 1-3 (1859); Giinth. 1. c. p. 65. PROC ZOOL. Soc-1897, No, XXXII. 32 |
