C ROT A LI DM 



part of the upper surface of the head. It is a large species 

 and very handsomely colored. 



Habits. — While this snake, like others of the genus, 

 doubtless spends most of its life on the ground, Cope men- 

 tions one which he discovered in the act of springing through 

 a bush. It was suspended over a branch, and was heavy in 

 its movements, except at the moment of leaping. 



209. Crotalus atrox Baird & Girard 



Desert Diamond Rattlesnake 



Plates 100, 107, and 108 



Crotalus atrox Baird & Girard, Cat. N. Amer. Rept., Pt. i, Serpents, 

 1^53, pp. 5, 156 (type locility, Indianola, Texas); Dumeril et 

 BiBRON, Erpetologie Generale, Vol. VII, Pt. 2, 185+, p. 1482; 

 Hallowell, Proc. Acad. Nat. Sci. Phila., 1856, p. 307; Baird, 

 U. S. Mex. Bound. Surv., Vol. II, 1859, p. 14, pi. I; Baird, Rep. 

 Pac. R. R. Surv., Vol. X, 1859, p. 39, pi. XXIV, fig. 3; Cope, Proc. 

 Acad. Nat. Sci. Phila., 1859, p. 337; Cooper, Proc. Cal. Acad. 

 Sci., Vol. IV, 1870, p. 66; Cope, in Yarrow, Surv. W. looth Merid., 

 Vol. V, 1875, p. 534; Stejneger, Report U. S. Nat. Mus. for 1893, 

 1895, P- 436, pi- 11; Van Denburgh, Proc. Cal. Acad. Sci., Ser. 

 2, Vol. VI, 1896, p. 348; Stejneger, Proc. U. S. Nat. Mus., Vol. 

 XXV, 1902, p. 158; Bailey, N. Amer. Fauna, No. 35, 1905, p. 49; 

 DiTMARs, The World Today, Oct. 1896, p. 1049; Ditmars, Reptile 

 Book, 1907, p. 452, pis. CXXIX, fig. 2, CXXX, fig. I, CXXXII; 

 RuTHVEN, Bull. Amer. Mus. Nat. Hist., Vol. XXIII, 1907, p. 591; 

 Strecker, Proc. Biol. Soc. Washington, Vol. XXI, 1908, p. 78; 

 Ellis & Henderson, Univ. Colorado Studies, Vol. X, No. 2, 1913, 

 p. 108; Van Denburgh & Slevin, Proc. Cal. Acad. Sci., Ser. 4, 

 Vol. 3, 1913, p. 426; Strecker, Baylor Bulletin, Vol. XVIII, No. 

 4) '915) P- 44; Grinnell & Camp, Univ. Cal. Publ. Zool., Vol. 

 17, No. 10, 1917, p. 196; VoRHiES, Univ. Ariz. Agric. Exper. Station 

 Bull. No. 83, 1917, p. 359; Stejneger & Barbour, Check List 

 N. Amer. Amph. Rept., 1917, p. 108; Cowles, Journ. Entomol. 

 & Zool., Pomona College, Vol. XII, No. 3, 1920, p. 66. 



Crotalus adamanteus atrox Jan, Rev. Mag. Zool., 1859, p. 153; Jan, 

 Elenco Sist. degli Ofidi, 1863, p. 123; Cope, Bull. U. S. Nat. Mus., 



