6. CROTAPHYTUS 105 



100th Merid., Vol. V, 1875, p. 565; COUES, Surv. W. 100th 

 Merid., Vol. V, 1875, p. 598; YARROW & HENSHAW, Ann. Rep. 

 Chief of Engineers for 1878, Surv. W. 100th Merid., Appendix 

 NN, 1878, p. 221; YARROW, Bull. U. S. Nat. Mus., No. 24-, 1883, 

 p. 52 (part); GUNTHER, Biologia Centrali-Americana, Kept., 1890, 

 p. 59 (part); HERRICK, TERRY & HERRICK, Bull. Sci. Labor. 

 Denison Univ., Vol. XI, 1899, p. 141; HERRICK, TERRY & 

 HERRICK, Bull. Univ. New Mexico, Vol. I, 1899, p. 14-1, pis. 

 XXII, XXIII; COPE, Report U. S. Nat. Mus. for 1898, 1900, p. 

 248, fig. 19 (part); DITMARS, Reptile Book, 1907, p. 113 (part); 

 FRANKLIN, Copeia, 1913, No. 1, p. 2. 



Crotafhytus collaris var. y BOCOURT, Miss. Sci. Mex., Rept., 1874, p. 

 155, pi. XVII bis., figs. 5 and 6. 



Crota-phytus baileyi STEJNEGER, N. Amer. Fauna, No. 3, 1890, p. 103, 

 pi. XII, fig. 1 (type locality, Painted Desert, Little Colorado 

 River, Arizona) ; STEJNEGER, N. Amer. Fauna, No. 7, 1 893, 

 p. 165; VAN DENBURGH, Proc. Cal. Acad. Sci., Ser. 2, Vol. 6, 



1896, p. 339; VAN DENBURGH, Occas. Papers Cal. Acad. Sci., V, 



1897, p. 53, fig.; VAN DENBURGH, Proc. Acad. Nat. Sci. Phila., 

 1897, p. 461; McLAiN, Critical Notes, 1899, p. 2; STEJNEGER, 

 Proc. U. S. Nat. Mus., Vol. 25, 1902, p. 149; GRINNELL, Univ. 

 Cal. Publs. Zool., Vol. 5, No. 1, 1908, p. 160. 



Crotafhytus collaris baileyi STONE & REHN, Proc. Acad. Nat. Sci. 

 Phila., 1903, p. 30; BAILEY, N. Amer. Fauna, No. 25, 1905, pp. 

 35, 40; MEEK, Field Columbian Mus., Zool. Ser., Vol. VII, No. 1, 



1906, p. 8; RUTHVEN, Bull. Amer. Mus. Nat. Hist., Vol. 23, 



1907, p. 512; COCKERELL, Univ. Colorado Studies, Vol. VII, 

 No. 2, 1910, p. 131; STONE, Proc. Acad. Nat. Sci. Phila., 1911, 

 p. 224; GARY, N. Amer. Fauna, No. 33, 1911, p. 25; VAN DEN- 

 BURGH, Proc. Cal. Acad. Sci., Ser. 4, Vol. 3, 1912, p. 147; TAY- 

 LOR, Univ. Cal. Publs. Zool., Vol. 7, No. 10, 1912, p. 346; ELLIS 

 & HENDERSON, Univ. Colorado Studies, Vol. X, No. 2, 1913, p. 

 66, pi. I, figs. 3, 4; VAN DENBURGH & SLEVIN, Proc. Cal. Acad. 

 Sci., Ser. 4, Vol. 3, 1913, p. 398; ATSATT, Univ. Cal. Publs. Zool., 

 Vol. 12, No. 3, 1913, p. 33; RICHARDSON, Proc. U. S. Nat. Mus., 

 Vol. 48, 1915, p. 406; RUTHVEN & GAIGE, Occas. Papers, 

 Mus. Zool. Univ. Michigan, No. 8, 1915, p. 17; VAN DENBURGH 

 & SLEVIN, Proc. Cal. Acad. Sci., Ser. 4, Vol. 5, 1915, p. 102; 

 STRECKER, Baylor Bulletin, Vol. XVIII, No. 4, 1915, p. 16; 

 ELLIS & HENDERSON, Univ. Colorado Bull., Vol. XV, No. 6, 1915, 



