576 . VIPEBIDiE. 



Yellowish or greyish bro-wa above, with a seriea of large dark 

 brown light-edged rhombs; a yellowish streak from the canthus 

 rostralis along the supraciliary border to the middle of the temple ; 

 an oblique dark streak below the eye; uniform yellowish white 

 beneath. 



Total length 760 millim. ; tail 65. 



Arizona, New Mexico, Texas, North Mexico. 



a. Yg. CSc. 27 ; V. 167 ; Duval Co., Texas. W. Taylor, Esq. [P.]. 

 0. 18). 



b. 2 (Sc. 25 ; V. 170 ; Huamatitla, Mexico, T. M. Rymer Jones, Esq. 

 0. 20). 8000 ft. [P.]. (Type of C. sal^ 



vini.) 



3. Crotalus confluentus. 



? Orotalinus viridis, Rafin. Am. McmtMy Mag. iv. 1818, p. 41 *. 



Crotalus confluentus, Say, in Long's Exped. Rocky Mount, ii. p. 48 

 (1823) ; Baird Sf Oir. Cat. N. Am. Eept. p. 8 (1853), and in 

 Marcy's Kvplor. Red Riv. p. 217, pi. i. (1853) ; Bum. ^ Bihr. vii. 

 p. 1475, pi. Ixxxiv. b. fig. 4 (1854) ; Baird, Rep. U.S. E.vpl. Surv. 

 R. R. X., Rept. p. 40 (1859) ; Cope, Proc. Ac. Philud. 1859, p. 387 | 

 Garm. N. Am. Rept. p. 114 (1883) ; Stejneger, N. Am. Faun, 

 no. 5, p. Ill (1891) ; Cope, Proc. U.S. Nat. Mm. xiv. 1892, p. 691 ; 

 Stejneger, Rep. U.S. Nat. Mus.f. 1893, p. 440 (1895). 



oregonus, Holbr. A\ Am. Serp., 2nd ed. iii. p. 21, pi. iii. 



(1842) ; Garm. N. Am. Rept. p. 173. 



lucifer, Baird 8f Gir. Proc. Ac. Philad. 1852, p. 177, and Cat. 



p. 6 ; Girard, U.S. Explor. Exped., Herp. p. 187, pi. xv. figs. 1-6 

 (1858) ; Baird, Rep. U.S. Expl. Surv. R. R. x., Williatnsorts Rep. 

 p. 10, pi. xi. (1859) ; Cope, Proc. Ac. Philad. 1859, p. 837 ; Lord, 

 Natur. Vane. Isl. ii. p. 303 (1866); Garm. I. c. p. 114 ; Stejneger, 

 N. Am. Faun. no. 5, p. Ill, and Rep. U.S. Nat. Mvs.f. 1893, p. 445. 



lecontei, Sallow. Proc. Ac. Philad. 1852, p. 180, and Rep. U.S. 



Surv. R. R. X., Williamson's Rep. p. 18, pi. iii. (1859). 

 atrox, Baird §• Gir. Cat. pp. 5 & 156 ; Baird, Rep. U.S. Mex. 



Bound. Surv., ii. Rept. p. 14, pi. i. (1859) ; Stejneger, Rep. U.S. 



Nat. Mus.f. 1893, p. 436. 

 adamanteus, var. atrox, Jan, Rev. 4" Mag. Zool. 1859, p. 153, 



and Icon. Gen. 46, pi. ii. fig. 1 (1874) ; Garm. I. c. p. 113 ; Cope, 



Proc. U.S. Nat. Mus. xiv. 1892, p. 690. 



adamanteus, var. confluentus, Jan, Rev. ^ Mag. Zool. 1859, 



p. 153. 



Caudisona atrox, var. sonorensis, Zennicott, Proc. Ac. Philad. 1861, 



p. 206. 

 Crotalus durissua {non L.), Wied, N. Acta Ac. Leop.- Carol, xxxii. i. 



1865, no. 8, p. 65. 

 Caudisona confluenta, Cope, Proc. Ac. Philad. 1866, p. 309. 



lucifer, Cope, I. c. 



atrox, Cope, I. v. 



Crotalus confluentus pulverulentus. Cope, Proc. Ac. Philad. 1883, 



p. 11, and Proc. U.S. Nat. Mus. xiv. 1892, p. 691. 

 exsul, Garm. I. c. p. 114. 



adamenteus ruber. Cope, Proc. U.S. Nat. Mvs. xiv. 1892, 



p. 690. 



* I have not been able to refer to this work. 



