POISONOUS SNAKES OF NORTH AMERICA. 427 



ed.. p. 199 (1888).— Barrincer, Yen. Rept. U. S., p. 4 (1891).— H. Gar- 

 MAX, Bull. Hi. State Lab. Nat. Hist., iii, p. 311 (1892).— H. Garmax, Biil]. 

 Ess. Inst., XXVI, 1894, p. 36. — Crotalophorus horridtis, Houttuyx, Linn. 

 Natnnr. Hist., xi, p. 309 (1764). — Caudisoim horrida, Flemixg, Pbilos. 

 Zool., II, p. 294 (1822).— Cope, in Mitchell's Res. V^en. Rattlei*n., p. 122 

 (1861).— Cope, Proc. Phila. Acad., 1866, p. .309.— Coues, Proc. Phila. 

 Acad., 1871, p. 48. 

 1768. — Caiidisona duri>isus, Lauren ri, Syn. Rept., p. 93 (in part only). — Crofahis 

 durissus, Gmelix, Syst. Nat., i, iii, p. 1081 (in part only) (1788). — 

 Latreille, Hist. Nat. Rept., in, p. 190 (1802).— Daudix, Hist. Nat. 

 Rept., V, p. 304, pL Lxviii, fig. 1, 2 (1803).— Harlax, Journ. Phil. Acad., 

 V. 1827, p. 368.— Harlax, Med. Phys. Res. (p. 135) (1835).— Schlegel, 

 Ess. Phys. Serp., i, p. 192; it, p. 565 (1837).— Kirtland, in Mather's 

 Sec. Rep. Geol. Surv., Ohio, pp. 167, 189 (1838).— Storer, Rep. Rept. 

 Mass., p. 233 (1839).— Holijrook, N.Am. Herp., 1 ed., ii, p. 81, pi. xvii 

 (1838); 2 ed.. Ill, p. 9, pi. i (1842).— DeKay, Zool.N. Y., iii,p, 55(1842).— 

 Thompsox, Hist. Yeriuont, i, p. 118 (1842). — Baird and Girahd, Cat. 

 N. Am. Serp., p. 1(1853).— LeConte, South. Med. Snrg. Journ., ix, 1853, 

 pp. 651, 663.— Baird, Serp. N. York, p. 9 (1854).— Baird, Pac. R. R. Rep., 

 X, Reptiles, p. U, pi. xxiv, fig. 1 (1859).— Baird, Pac. R. R. Rep., x, 35th 

 Par.,Whipple'sRoute, p. 39(1859).— DuMERiLetBiBROX, Erpet. Ge'n.. vii, 

 p. 1465 (1854).— Kexxicott, Trans. 111. State Agr. Soc, 18.53-1854, i (p. 

 592).— Jax, Rev. Mag. Zool., 1859, Extr., p. 28.— .Jan, Elenc. Sist. Ofid., p. 

 123 (1863).— Fogg, Sec. Ann. Rep. Nat. Hist. Geol. Maine, p. 141 (1863).— 

 Yerrill, Proc. Boston Soc. Nat. Hist., ix. 186.3, p. 197.— Hoy, Smith- 

 son. Rep., 1864, p. 435.— Allex, Proc. Boston Soc. Nat. Hist., 1869, pp. 

 179, 203.— S.MiTH, Rep. Geol. Snrv. Ohio, iv, 1882, p. 672.— Higley, 

 Traus. Wise. Acad. Sc, Aii, 1884, p. 161. 

 1799. — CvotaluHboiquira, Beauvois, Traus. Am. Philos. Soc, iv, p. 368, pi. fac. p. 



380, low. fig. 

 1802. — Crofahts atricaudatus, Latreille, Hist. Nat. Rept., in, p. 209.— Daudix, 



Hist. Nat. Rept., v, p. 316 (1803). 

 1818. — Crotalhiiis cyauitntfi, Rafixesque, Amer. Month. ^Mag., in (p. 446) ; iv, 



p. 41. 

 18.59. — ? CrotaJus diirinsiis, var. coiicolor, .Jax, Rev. Mag. Zool., 1859, Extr , p. 28. 

 1859. — Croialus dttrissKS, var. melaiiurux, Jax, Rev. Mag. Zool.. 1859, Extr., p. 28. 

 1883. — CrotalKS horridus, var. atricandaiuK, Garmax, Rept. Batr. N. Am., i, Ophid., 



pi. IX, fig. 1. 

 F'ujHres: Catesby, Carolina, n. pi. xli (1743). — LacepJide, Quad. Ovip. Serp., ii, 

 (pi. XVIII, figs. 1, 3) (1789).— BoxxATKRRE, Ophiol.. (pi. n, fig. 3) (1790).— 

 Shaw, Gen. Zool., ni, pi. lxxxviii (1802). — Daudix, Hist. Nat. Rept., pi. 

 LXVIII, figs. 1, 2 (1803). — GuERix, Icon. Regne Anim., (pi. xxin, fig. 2) 

 (1829-38).— ScHLECiEL, Ess. Phys. Serp., Atlas, pi. xx, figs. 15, 16 (1837).— 

 HoLBROOK, N. Amer. Herpet., 1 ed., ii, pi. xvii (1838) ; 2 ed., in, pi. i (1842). — 

 DeKay, Zool. N. York, in, pi. ix, fig. 19 (1842).— Baird, Serp. N. York, pi. i, 

 fig. 1 (1854). — DuMERiL et Bibrox, Erpet. G^n., Atlas, pi. Lxxxiv bis, fig. 1 

 (18.54).— Baird, Pac. R. R. Rep., x, pi. xxiv, fig. 1 (18.59).— Jax, Icon. Ophid. 

 livr. 46, pi. I, figs. 1,2 (1874). — Garmax, Rept. Batr. N. Am., i, Ophid., pi. ix, 

 rig. 1(1883).— Brehm's Thierleben, 3 ed., vii, p. 440 (1892). 



Description * — Head angular. Scales between the superciliaries 

 siiialL numerous, uniform. Plates above suout, 2 anterior frontal [inter- 

 nasalsj and 5 postfrontal [prefrontals]. Suborbital chain continuous, of 



" By S'. F. Baird, from a speciraeu from Huntingdon Co., Pennsylvania, U. S. Nat. 

 Mus., No. 245. Baird «fe Girard, N. Am. Serp., pp. 1-2. 



