350 REPORT OF NATIONAL MUSEUM, 1898. 



our bouiulary that it is not uulikelj^ to be found within our limits. 

 Indeed, I am not sure that I did not see this animal on the rocky banks 

 of the Eio Grande at Laredo, Texas, in 1885. 



SCELOPORUS TORQUATUS POINSETTII Baird and Girard. 



Sceloporus torquaius poinsetUi Cope, Proc. Amer. Phil. Soc, XXII, 1885, p. 402. — 

 BOULENGKR, Cat. Liz. Brit. Mus., II, 1885, p. 220. 



? Sceloporus iorquatus, var. B. Wiegmann, Herp. Mex., 1834, p. 50. 



Sceloporus poinsettti Baird and Girard, Proc. Acad. Nat. Sci. Phila., VI, August, 

 1852, p. 126 (San Pedro of Texas and Sonora, type) ; U. S. Mex. Bound. Surv., 

 1859, Rept., p. 5, pi. xxix, figs. 1-3. — Bocourt, Miss. Sci. Mexique, III, 

 Rept.,p. 171, pi. XVII, figs. 9, 9rt, 9&, 9c.— Cope, Bull. U. S. Nat. Mus., No. 17, 

 1880, p. 17. 



Fi;. 51. 



SCELOPORCS TORliUATUS POINSETTII I'.AIKl) AND (JlRARD. 



Texas. 



Cst. No. 9920, II.S.N.M. 



Sceloporus poinsettii. — A very large occipital, the encircling plates 

 small, and the middle cephalic plates generally not regular. Supraor- 

 bitals and anterior cephalic plates as in S. iorquatus (the former in five 

 series). Free portion of hind toe scarcely three-fifths the length of 

 cephalic ])lates. Scale on back very broad, semicircular; along the 

 middle very obsoletely carinated, and all without spine, but denticu- 

 lated freely, as are the inferior scales. The more lateral dorsal scales 

 more distinctly carinate and spinous. Dorsal scales a little larger than 

 those on rump, but scarcely narrower than the caudal. Inferior tibial 

 scales smooth. Thirty-two oblique rows of scales from head to tail, 



