304 3. IGUANID.'E 



) oadside banks honeycombed with abandoned gopher (Tho- 

 momys) holes, which afford it ample opportunity to hide 

 upon the approach of danger. Its coloration, especially the 

 intensity of the black of the lower surfaces and the blue of 

 the throat, is subject to much variation in the same individ- 

 ual, and is more or less dependent upon the coloring of sur- 

 rounding objects. 



In winter it sometimes is found in the interior of decay- 

 ing logs, but I believe that it more frequently hibernates 

 under ground. 



61. Sceloporus occidentalis biseriatus (Hallowell) 



Western Blue-bellied Lizard 



Plate 24 



Sceloporus biseriatus Hallowell, Proc. Acad. Nat. Sci. Phila., 1854, 

 P- 93. (type locality, borders of El Paso Creek and in Tejon 

 Valley, [California]); Hallowell, Rep. Pac. R. R. Surv., Vol. 

 X, Pt. IV, 1859, Rept., p. 6, pis. VI figs, la-af, & VIII; Cooper, 

 Proc. Cal. Acad. Sci., Vol. IV, 1870, p. 71; Cope, Proc. Amer. 

 Philos. Soc, Vol. XXII, 1885, p. 395; Stejneger, N. Amer. Fauna, 

 No. 7, 1893, p. 184; Van Denburgh, Proc Cal. Acad. Sci., Ser. 

 2, Vol. 5, 1895, p. 1 14; Van Denburgh, Proc. Cal. Acad. Sci., 

 Ser. 2, Vol. 5, 1896, p. 1005; Van Denburgh, Occas. Papers Cal. 

 Acad. Sci., V, 1897, p. 80, fig.; Cope, Report U. S. Nat. Mus. for 

 1898, 1900, p. 381, fig. 61; Meek, Field Columbian Mus., Zool. 

 Series, Vol. VII, No. i, 1906, p. 1 1; Grinnell & Grinnell, Throop 

 Institute Bull., No. XXXV, 1907, p. 22, figs. 3, 4; Grinnell, 

 Univ. Cal. Pubis. Zool., Vol. 5, No. i, 1908, p. 161; Stone, Proc. 

 Acad. Nat. Sci. Phila., 191 1, p. 228; Van Denburgh, Proc. Cal. 

 Acad. Sci., Ser. 4, Vol. 3, 1912, pp. 148, 149, 150, 151, 152, ij6; 

 Taylor, Univ. Cal. Pubis. Zool., Vol. 7, No. 10, 1912, p. 350; 

 Atsatt, Univ. Cal. Pubis. Zool., Vol. 12, No. 3, 1913, p. 35; Rich- 

 ardson, Proc. U. S. Nat. Mus., Vol. 48, 191 5, p. 421; Ruthven & 

 Gaige, Occas. Papers, Mus. Zool. Univ. Michigan, No. 8, 1915, 

 p. 19, pi. V, fig. i; Van Denburgh & Slevin, Proc. Cal. Acad. 

 Sci., Scr. 4, Vol. 5, No. 4, 191 5, p. 100. 



