. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. CROCODILIANS, LIZARDS, AND SNAKES. 385 SCELOPORUS THAYERII Baird and Girard. SceloporuH thayerli Baird and Girard, Proc. Acad. Nafc. Sci. Phila., VI, 1852, p. 127.—Bairo, U. S. ami Mexican Boimd. Surv., II, 1850, Kcptilia, p. 6.—Bo- couuT, JNIiss. Sci. Mex., 1874, p. 176, pi. xviii, ii<f. 5. Scelo2)orits coiisobrinns Baikd and diHAUO, Marcy's Kept. Nat. Hist. Red River, 1853, p. 237. Cephalic plates much as in S. undulatm. Frontal undivi
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. CROCODILIANS, LIZARDS, AND SNAKES. 385 SCELOPORUS THAYERII Baird and Girard. SceloporuH thayerli Baird and Girard, Proc. Acad. Nafc. Sci. Phila., VI, 1852, p. 127.—Bairo, U. S. ami Mexican Boimd. Surv., II, 1850, Kcptilia, p. 6.—Bo- couuT, JNIiss. Sci. Mex., 1874, p. 176, pi. xviii, ii<f. 5. Scelo2)orits coiisobrinns Baikd and diHAUO, Marcy's Kept. Nat. Hist. Red River, 1853, p. 237. Cephalic plates much as in S. undulatm. Frontal undivided. Free portion of long hind toe reaciiing from mouth to middle of occipital plate. Dorsal, rump, and caudal scales about eipuil, tlic front rather hirger than the lateral scales. Scales above angular pointed, with conspicuous keel and spine, with decided lateral denticulations. Belly scales are quite decidedly carinated, those ou inside of the tibia and behind anus still more so. There are about forty-two oblicpio series of scales on each side the back, about twenty-eight or thirty from tho cer-. Fig. 62. SCELOPORUS THAYERII BAIED AND GlKARD. < 2. 5. Texas. Cat. No. 5887, U vical folds. Femoral pores about twelve or lifteen. Light lines on each side of the back, separated by six or .seven scales only; between these two series of dark blotches. I\lale with a continuous, well-marked black stripe on the sides, from above the arm, and a blue patch on each s^ide the belly; black internally and behind; a black patch cm each side the posterior half of chin, sometimes (not always) confluent internally, each one with another always distinct one of blue. Tiiis species has a close resembhviice to S. undKlatus, and sometimes is distinguished with great diiliculty. The interparietal is larger, the parietals smaller, and two on each side instead of one. The scales are more strongly cariimted. The light stripes on each side the back are near together, being separated by an in
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