CROCODILIANS, LIZARDS, AND SNAKES. 1185 



from two to three rows of scales wide. Tbey are sepurated from the other blotches 

 on the same side of the back by about one and cue-half scales, and from those of the 

 opposite side by the width of one scale. There are two or three rows of smaller 

 alternating brown spots on the sides. The gastrosteges, except anteriorly, are dark 

 slate. The edges of the gastrosteges and of the scales of the first row are whitish. 

 The tip of the tail is bright salmon or tiosh color. 



inni. null. iiim. 



Length to rattle 147 34» 341 



Length of tail 41 29 32 



Segments in rattle 7-t- 6 3 + 



One of the five specimens has ten snpralabials on one side of the head. 



Habitat. — The Eluacliuca Mouutains, southeastern Arizona. Museum 

 of the Lelaud Stanford University, Palo Alto, California. W. W. Price, 

 collector. 



This interesting- species has relationships with both the C. tigris and 

 the C. lepidus, }n(lgi\\g from the description. It seems to be quite dis- 

 tinct from both in the small number of labial plates and the number 

 and size of the dorsal spots. The urosteges are more than usually 

 divided. 



CROTALUS HORRIDUS Linnaeus. 



Crotalns horridus Linn.eus, Syst. Nat. Ed., XII, 1, 1766, p. 372 [Prirn^. cit. Mus. 

 Ad. Fr., I, 39, ubi "Frons tecta sqnamis obtusissimis, palpebral snperiores 

 plana; magna^" legatur. Porro, Catesby CaroL Hist. (J) et Amcenitat. Acad. 

 {!)) citantur. (A. " riperacaudisoua amerieana," el " V. c. a. minor" descrihuntur, 

 pp. 41, 42; sed '' I.e. a. minor caput sentis muf/nis instriictum habet."^) (B.In. 

 Amccn. Acad., II, p. 139. C. durissa {hujus enumerationis) {Amum. Acad., I, 500) 

 cifaiur! et " Virfjinianis rattlesnake" denominatnr!) Secundo cit. Seba. 95, f 1., 

 ubi C. terrifica delineatur! !]— SiiAW, Gen. Zool., Ill, 1802, p. 317. — Cuvier, 

 K(gne Animal, II, 1817, p. 78. — Okay, Synopsis Kept., 1830, p. 78. — Guerin, 

 Iconogr. R. Auim., 1830, pi. xxiii, fig. 2. — Griffith, Cuv. Rrgne Animal, IX, 

 1831, p. 267.— Le Conte, Proc. Acad. Nat. Sci. Phila., VI, 1853, p. 417.— Cope, 

 Proc. Acad. Nat. Sci. Phila., 1859, p. 338; Check-list N. Amer. Batr. Kept., 1875, 

 p. 33. 



Crotalns durissus Latreille, Hist. Kept., Ill, 1801, p. 190. — Daudin, Hist. Rept., 

 V, 1802, p. 304 (exclns. cit. Linna'us, Laurenti, Lacdpcde). — Harlan, Journ. 

 Acad. Nat. Sci. Phila., p. 368 (exclus. cit. Linnu'us and Lanrenti); Med. et 

 Phys. Res., 1825, p. 132. — Schlegel, Essai sur le Phys. Serp., II, 1837, p. 365 

 (exclus. descrip. color., p. 366, and homonyms, Uropsophns iriseriatus Wagler 

 and Crotalns conflnentus Say). — Storkr, Report Rept. Mass., 1839, p. 233. — 

 HoLHRooK, N. Amer. Herp., Ill, 1842, p. 9 (exclus. cit. Linu:\»u8). — De Kay, 

 Zoology of N. Y., Pt. 3, 1842, p. 55 (exclus. cit. Linna^ns, Say). — Le Conte, 

 Southern Med. and Surg. Jouru., 1853, p. 663. — Baird aud Girard, Cat. N. 

 Amer. Kept., Pt. 1, Serp., 1853, p. 9 (exclns. cit. Linmeus). — 1]airi), Serpents of 

 N. Y., 1845, p. 9 (exclns. cit. Linua'us). — Dumeril and Bibkon, Erp. G6n., VII, 

 1854, p. 1465 (exclus. cit. Linna'us Latreille, and Wagler). — Baird, U. S. Pac. 

 R. R. Expl. Surv.,X, Whipjile's Kept. Reptiles, 1859, p. 39 (exclus. cit. Lin- 

 na'us). — ? .Ian Kev. et Mag. de Zool.. 1859, p. 153. 



Crotalns atricandatns Latreille, Hist. Kept., Ill, 1801, p. 209. — ? Boie, Isis von 

 Oken, 1827, p. 562.— Wagler, Nat. Syst. Amphib., 1830, p. 177.— Gray, Zool. 

 Miscell.,1842, p.51. 



Urocrotalon durissHs Fitzingek, Syst. Rept., 1843, p. 29. 



'Linnseus Syst. Nat., in C. miUarii diagnosi. 

 NAT MUS 98 75 



