CROCODILIANS, LIZARDS, AND SNAKES. 



1141 



Mountains. The species do not occur on the dry plains of tlie interior, 



nor in the Pacific region; a subspecies of the N. ratenatus ranges west 



to Arizona. 



SISTRURUS MILIARIUS Linnaeus. 



SistrtmiamiUanusCTATiMAS, N. Amer. Kept., 1883, p. 110.— Ste.jneuku, Report II. S. 

 Nat. Mas. for 1893 (1895), p. 418, pi. vii.— Boulengkr, Cat. Snakes Brit. Mus., 

 Ill, 1896, p. 569. 



Crotalus miHarius Linnaeus, Syst. Nat., 12th ed., I, 1766, p. 372.— Gmelix, Linn. 

 Syst. Nat., I, 1788, p. 1080.— LaciSpedk, Hist. Serp., II, 1789, p. 421.— Bonxa- 

 TEKRE, Ophiol., 1790, p. 1.— SiiAw, Gen. Zool., Ill, 1802, p. 336.— Daudin, 

 Hi.st. Kept., V, 1802, p. .328.— Cuviek, Hf^gne Auiiiial, H, 1817, p. 79.— Mkkrkm, 

 Syst. Aiuphib., 1820, p. 156.— Boie, Isia, 1827, i-. .">62.— Schlec.el, Essai, II, 

 1837, p. 569 (exclns. liomoii. C. tcrgeminus Say).— DuMi'nai, .and Bibhon, Krp. 

 G<Mi., VII, 18.54, p. 1477. 



Crotalophorns miliariHS Gray, Ann. Philos., 1825, p. 205.— Gray, Grillith's Anim. 

 King., 1830, p. 78.— Holbrook, N. Am. Herp., 1842, p. 25.— Gray, Cat. Brit. 

 Mus., 1849, p. 17.— Baird and Girard, Cat. N. Amer. Kept., Pt. 1, 1853, p. 1 1.— 

 Baird, U. S. Pac. K. R. Expl. Rep., X, Whipple's Kept., 18,59, p. 40. 



Caudisona viiliaria FrrzixGER, Nene Class., 1826, p. 63.— Wagler, Nat. Syst. 

 Amph., 1830, p. 176.— Gray, ZooI.Misc., 1842, p. 51.— Fitzixger, Syst. Kept., 

 1843, p. 29. 



Figures, Catesby, Hist. Car., II, pi. xlii.— ? Bonxaterre, Ophiologie, I, 

 tig. 1.— ScHLEGEL, Essai, XV, figs. 17, 18.— Holbrook, N. Am. Herj*., HI, 

 pi. IV.— DuMKRir, and Bibhox, Erp. Gon., pi. i.xxxiv, bis., lig. 5; U. S. 

 Pac. R. R. Surv. Kept., X, Reptiles, pi. xxiv. 



Fig. 327. 



SiSTRUIlUS MILIARIUS LlNN^0S. 



= 1. 



Volusia, Florid.i. 



Collection of E. D. Cope. 



This species has some marked characteristics as compared with other 

 species of the genus. The body is robust at the middle as compared 

 witli its extremities: it tapers especially i)Osteriorly, so that the tail is 

 unusually slender. Tlie rattle is proportionally reduced in size, and is 

 smaller than that of other species of the same dimensions. Its form 

 is acuminate and the segments are so small as to have suggested to 

 Linnauis the name of the species. The body is at its middle parts com- 

 pressed toward the middle line, or obtusely roof-shaped. The neck is 

 narrow and compressed, and the head oval in outline. 



Tlie canthus rostralis is sharply defined, more so on account of a 

 shallow groove within it on the superior face of the muzzle. The ros- 

 tral plate is perpendicular, and is not recurved on the muzzle. Its lat- 



