POISONOUS SNAKES OF NORTH AMERICA. 427 



ed., p. 199 (1888).— Bakkinger, Veu. Kept. U. S., p. 4 (1891).— H. Gar- 

 man, Bull. 111. State Lab. Nat. Hist., in, p. 311 (1892).— H. Garman, Bull. 

 Ess. lust., XXVI, 1894, p. 36.—Crotalo2)horus horridKn, HouttuYxV, Linu. 

 Natuur. Hist., vi, p. 309 (1764:).— Caiidimua horrida, Fleming, Philos. 

 Zool., II, p. 294 (1822).— Coi'K, iu Mitcliell's Res. Ven. Rattlesn., p. 122 

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

 Acad., 1871, p. 48. 

 VJQS.— Caiidisona durhsHS, LAruENTi, Syu. Rept., p. 93 (iu part ouly).— CVo<«7hs 

 duri.ssii8, Gmelin, Syst. Nat., i, iii, p. 1081 (iu part ouly) (1788).— 

 Latkeille, Hist. Nat. Rept., m, p. 190 (1802).— Daudin, Hist. Nat. 

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

 V, 1827, p. 368.— Harlan, Med. Pbys. Res. (p. 135) (1835).— Schlegel, 

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

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

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

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

 Thompson, Hist. Vermont, i, p. 118 (1842).— Baird aud Girahd, Cat. 

 N. Am. Serp., p. 1(1853).— LeConte, Soutb. Med. Surg. Jouru., ix, 1853, 

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

 X, Reptiles.p. 14, pi. xxiv, fig. 1 (1859).— Baird, Pac. R. R. Rep., x, 35tb 

 Par.jWhipple'sRonte, p. 39(1859).— DUMERiLetBiBRON,Erpet.G(?n.,Yii, 

 p. 1465 (1854).— Kennicott, Trans. 111. State Agr. Soc, 1853-1854, i (p. 

 592).— Jan, Rev. Mag. Zool., 1859, Extr.,p. 28.— .Ian, Eleuc. Sist. Ofid., p. 

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

 Verrill, Proc. Boston Soc. Nat. Hist., ix, 1863, p. 197.— Hoy, Smith- 

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

 179, 203.— Smith, Rep. Geol. Surv. Ohio, iv, 1882, p.672.— Higley, 

 Trans. Wise. Acad. Sc, vii, 1884, p. 161. 

 nQQ,—Crotali(8 boiquira, Beauvoi.s, Trans. Am. Philos. Soc, iv, p. 3G8, pi. fac. p. 



380, low. fig. 

 1802. — Crotalus atricaiidatiis, Latreille, Hist. Nat. Rept., in, p. 209.— Daudin, 



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

 1818, — CrofaUtiKS ci/unurns, Rafixesque, Amer. Month. Mag., in (p. 446); iv, 



p. 41. 

 1859. — ? Crotalus durissus, var. concolor, Jan, Rev. Mag. Zool., 1859, Extr , p. 28. 

 1859_ — Crokilu.s durissus, var. melaiiiirns, Jan, Rev. Mag. Zool., 1859, Extr., p. 28. 

 1883. — Crotalus horridus, var. atricaudaius, Garman, Rept. Batr. N. Am., i,Ophid., 



pi. IX, fig. 1. 

 Figures: Catesby, Carolina, ii, pi. xli (1743). — Lacep^de, Quad. Ovip. Serp., ii, 

 (pi. xvin, figs. 1, 3) (1789).— Bonnaterre, Ophiol., (pi. n, fig. 3) (1790).— 

 Shaw, Gen. Zool., in, pi. Lxxxvin (1802).— Daudin, Hist. Nat. Rept., pi. 

 Lxvin, figs. 1, 2 (1803).— GUERIN, Icon. Regne Anim., (pi. xxni, fig. 2) 

 (1829-'38).— Schlegel, Ess. Pbys. Serp., Atlas, pi. xx, figs. 15, 16 (1837).^ 

 Holbrook, N. Amer. Herpet., 1 ed., ii, pi. xvn (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 Bibron, Erpct. G«^n., Atlas, pi. lxxxiv bis, fig. 1 

 (1854).— Baird, Pac. R. R. Rep., x, pi. xxiv, fig. 1 (1859).— Jan, Icon. Opbid. 

 livr. 46, pi. 1, figs. 1, 2 (1874).— Garman, Rept. Batr. N. Am., i, Opbid., pi. ix, 

 fig.I(1883).— Brehm's Tbierleben, 3 ed., vii, p. 440 (1892). 



Description* — Head angular. Scales between tlie superciliaries 

 small, nurueroiis, uniform. Plates above snout, 2 anterior frontal [inter- 

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



* By S. F. Baird, from a specimen fiom Huntingdon Co., Pennsylvania, IJ. S. Nat. 

 Mas., No. 245. Baird & Girard, N. Am. Serp., pp. 1-2. 



