174 SYSTEMATIC LIST AND SYNONYMY. 



SOLENOGLYPH A-Continued. 



scales. Labials 16, the last large, three rows between them and the 

 orbit. Scales in 25 rows, keels of outer row weaker. Ventrals 198. 

 Subcaudals 26. Greyish-yellow, punctulate with brown. Dorsal 

 spots about 42, lateral angles produced down the flank. Five black' 

 cross bands on the tail. A yellow band from the nasals to the upper 

 borders of the hinder labials. Above this a brown band from the 

 eye. 



Lower California. 



Var. enyo 



Caudisona enyo Cope, 1861, Pr. Phil. Ac, 293, — 1866, Pr. Phil. Ac., 

 309. Crotalvs enyo Yarr., 1875, Wheeler's Rep., V, 534; Cope, 1875, 

 Checklist, 33. 



Internasals and frontals small, scale-like. Eostral low, equilateral. 

 Nasal in contact with rostral. Numerous small scales in front of the 

 pit. Labials 13 or 14, separated from orbit by three scales. Infralab- 

 ials 14 or 15. Scales in 23 rows, keels in outer two or three obsolete. 

 Ventrals 166. Subcaudals 26. Light greyish-brown, shaded with 

 yellow. A pair of small brown spots on vertex. A light band bor- 

 dered with dark across the supraciliaries. A band from the eye over 

 the last labial to the neck. A series of about thirty-three vertebral 

 spots, longer anteriorly, broader posteriorly, and fusing with the lat- 

 eral spots, forming vertical bands on the flanks. Belly yellow, mot- 

 tled with darker. Resembles C. mobssus in coloration. 



Lower California. 



Ceotalus Exsuxsp. n 114 



Cedros Island. 



Ceotaltjs hobeidus "Banded Rattlesnake" 115 



Crotalus horridvs Linn., 1758, Syst, I, 214, — 1766, Syst,, I, 372 ; Bonn., 

 1790, Ophiol., 1, pi. 2, f. 3; Shaw, 1802, Zool., Ill, 317, pi. 88; Cuv., 

 1817, R, An., II, 78, — 1836, R. An., I, 413; Guerin, 1829-38, Icon. 

 R. An., Rept, 15, pi. 23, f. 2; Griffith, 1831, An. King., IX, 267; 

 Gray, 1831, Syn. Rept, 78, mixed; LeC, 1853, Pr. Phil. Ac, 417; 

 Cope, 1859, Pr. Phil. Ac, 338, — 1875, Checklist, 33; Yarr., 1875, 

 Wheeler's Rep., V, 534. Caudisona horrida Cope, 1861, Mitch. Res., 

 122, — 1866, Pr. Phil. Ac, 309. Caudisona durissa Laur., 1768, Syn. 

 Rept., 93. Crotahis durissus Gmel., 1788, Syst. Linn., I, 1081, after 

 Laur., mixed ; Latr., 1801, Rept, III, 190; Daud., 1803, Rept, V, 304, 

 pi. 68, f. 12; Harl., 1827, Jour. Phil. Ac, 368, — 1835, Med. Res., 132; 

 Schleg., 1837, Essai, I, 192, II, 365, pi. 20, f. 15, 16; Storer, 1S39, 

 Rept. Mass., 233; Holbr., 1842, Herp., Ill, 9, pi. 1; DeK., 1842., 

 N. Y. Fauna, III, Rept, 55, pi. 9, f. 19; B. &G., 1853, Serp., 1; LeC, 

 1853, Med. Jour., 663; Bd., 1854, N. Y. Serp., 9, — 1859, P. R. R. 

 Rep., X, AVhipple, 39, pi. 24, f. 1; D. & B., 1854, Erp., VII, 1465; 

 Mart, 1856, Mus. Berl., 34; Jan, 1859, Rev. Mag. Zool., Extr., p. 28, 

 — 1863, Sist, 123, — 1874, Icon., livr. 46, pi. 1, f. 1, 2; Allen, 1869, 

 Pr. Bost. Soc, 179. Crotalinus Cyanurvs Raf., 1818, Am. Month. Mag., 

 IDT, 446, IV, 41. Urocrotahn durissus Fitz., 1843, Syst, 29. Urop- 



