6. CROTAPHYTUS n7 



Vol. II, 1885, p. 20 + ; Gunther, Biologia Centrali-Americana, 

 Rcpt., 1890, p. 59; Stejneger, N. Amer. Fauna, No. 3, 1890, p. 

 105; Stejneger, N. Amer. Fauna, No. 7, 1893, p. 167; Van 

 Denburch, Bull. U. S. Fish. Com., 1894, p. 56; Cope, Amer. 

 Natvralist, Vol. XXX, 1 896, pp. 1013, 1015, 1018; Van Denburgh, 

 Proc. Cal. Acad. Sci., Ser. 2, Vol. 5, 1896, p. 1004; Van Den- 

 burgh, Proc Cal. Acad. Sci., Ser. 2, Vol. 6, 1896, p. 3 39; Van 

 BURGH, Occas. Papers, Cal. Acad. Sci., V, 1897, p. 56; Herrick, 

 Terry & Herrick, Bull. Sci. Lab. Denison, Univ., Vol. XI, 1899, 

 p.l40; Herrick, Terry & Herrick, Bull. Univ. New Mexico, Vol. 

 I, 1899, p. 140; McLain, Critic.il Notes, 1899, p. 2; Cope, Rep. 

 U. S. N*t. Mus. for 1898, 1900, p. 25 5, fig. 21 (part); Stone & 

 Rehn, Proc. Acad. Nat. Sci. Phila., 1903, p. 31; Brown, Proc. 

 Acad. Nat. Sci. Phila., 1903, pp. 545, 552; Van Denburgh, Proc. 

 Cal. Acad. Sci., Ser. 3, Zool., Vol. 4, No. 1, 1905, pp. 3, 25 ; Bailey, 

 N. Amer. Fauna, No. 25, 1905, pp. 28, 40; Meek, Field Columb. 

 Mus., Zool. Ser., Vol. VII, No. 1, 1906, p. 8; Grinnell & Grin- 

 NELL, Throop Institute Bull., No. XXXV, 1907, p. 56, fig. 22; 

 DiTMARs, Reptile Book, 1907, p. 115, pi. XXXVII, fig. 2; Ruth- 

 VEN, Bull. Amer. Mus. Nat. Hist., Vol. XXIII, 1907, p. 515; 

 Grinnell, Univ. Cal. Pubis. Zool., Vol. 5, No. 1, 1908, p. 160; 

 Stone, Proc. Acad. Nat. Sci. Phila., 1911, p. 224; Van Denburgh, 

 Proc. Cal. Acad. Sci., Ser. 4, Vol. 3, 1912, p. 152; Van Denburgh, 

 Proc. Cal. .Acad. Sci., Ser. 4, Vol. 3, 1912, p. 155; Taylor, Univ. 

 Cal. Pubis. Zool., Vol. 7, No. 10, 1912, p. 346; Van Denburgh 

 & Slevin, Proc. Cal. Acad. Sci., Ser. 4, Vol. 3, 1913, p. 398; 

 Atsatt, Univ. Cal. Pubis. Zool., Vol. 12, No. 3, 1913, p. 34; 

 Franklin, Copeia, 1914, No. 5, p. 1; Van Denburgh & Slevin, 

 Proc. Cal. Acad. Sci., Ser. 4, 1914, pp. 132, 144, 145; 

 Richardson, Proc. U. S. Nat. Mus., Vol. 48, 1915, p. 407; Ruth- 

 ven & Gaige, Occas. Papers Mus. Zool. Univ. Michigan, No. 8, 

 1915, p. 16; Van Denburgh & Slevin, Proc. Cal. Acad. Sci., 

 Ser. 4, Vol. 5, 1915, p. 103; Strecker, Baylor Bulletin, Vol. 

 XVIII, No. 4, 1915, p. 17; Camp, Univ. Cal. Pubis. Zool., Vol. 12, 

 No. 17, 1916, p. 522; Camp, Univ. Cal. Pubis. Zool., Vol. 17, 

 No. 7, 1916, p. 70; Grinnell & Camp, Univ. Cal. Pubis. Zool., 

 Vol. 17, No. 10, 1917, p. 152; Stejneger & Barbour, Check 

 List N. Amer. Amph. Rept., 1917, p. 46; Cowles, Journ. Entomol. 

 & Zool., Pomona College, Vol. XII, No. 3, 1920, p. 64; Stephens, 

 Trans. San Diego Soc. Nat. Hist., Vol. Ill, No. 4, 1921, p. 61; 



