241. SLAPS. 423. 
Vipera fulvia, Harl. Journ. Ac. Philad. vy. 1827, p. 364. 
Elaps tenere, Baird § Gir. Cat. N. Am. Rept. pp. 22 & 156, and 
Rep. U.S. Mex. Bound. Surv. ii. x., Rept. p. 15, pl. vii. fig. 1 
(1859). 
tristis, Baird § Gir. Cat. p. 23. 
circinalis, Dum. & Bibr. t. ¢. p. 1210. 
— diastema, Dum. § Bibr. t. ¢. p. 1222. 
—— epistema, Dum. & Bibr. t. ¢. p. 1222. 
—— nigrocinctus, Girard, Proc. Ac. Philad, 1854, p. 226, and U.S. 
Nav. Astron. Exped. ii. Zool. p. 210, pl. xxxv. (1855). 
divaricatus, Hallow. Journ. Ac. Philad. (2) iii. 1855, p. 36. 
fulvius, part., Giinth. Cat. p. 235 (1858), Ann. § Mag. N. H. 
(3) iv. 1859, p. 169, and Biol. C.-Am., Rept. p. 182 (1895). 
fitzingeri, Jan, Rev. § Mag. Zool, 1858, p. 521, and Prodr. 
pl. A (1859). 
—— apiatus, Jan, ll. cc. p. 522, pl. A. 
—— aflinis, Jan, Ul. cc. p. 525, pl. B. b 
——agleope, Cope, Proc. Ac. Philad, 1859, p. 844; Giinth, Bool. 
_C-Am., Rept. p. 184. 
distans, Kennicott, Proc. Ac. Philad. 1860, p. 338; Cope, Proc. 
US. Nat. Mus. xiv. 1892, p. 681. 
corallinus, Salvin, Proc. Zool. Soc. 1861, p. 228; Duges, 
Naturaleza, vii. 1885, p. 201. 
hippocrepis, Peters, Mon. Berl. Ac. 1861, p. 925. 
corallinus, var, crebripunctatus, Peters, Mon. Berl. Ac, 1869, 
_ p. 877. 
marcgravi, var. laticollaris, Peters, 1. ¢. 
ne var. circinalis, Jan, Icon. Gén. 41, pl. vi. fig. 1 
(1872). 
laticollaris, Garm. 1. ce. p. 107. 
ephippifer, Cope, Proc. Amer. Philos. Soc. xxiii. 1886, D. 281. 
bernardi, Cope, Bull. U.S. Nat. Mus. no. 32, 1887, p. 87. 
diastema, var. michoacanensis, Dugés, Naturaleza, (2) i. 1891, 
p. 487, pl. xxxii. 
—— lemniscatus, part., Giinth. Biol. C.-Am., Rept. p. 185. 
ruatanus, Giinth. 7. c. p. 185, pl. lvii. fig. B. 
Eye shorter than its distance from the mouth (one half to two 
thirds) in the adult. Rostral broader than deep; frontal as broad 
as or broader than the supraocular, once and a half to twice as 
‘long as broad, as long as or a little shorter than its distance from 
the end of the snout, shorter than the parietals; latter longer than 
their distance from the internasals ; one pra- and two postoculars ; 
temporals 1+1 (rarely 1+2); seven upper labials, third usually 
larger than fourth, third and fourth entering the eye; three or 
four lower labials in contact with the anterior chin-shields, which 
are shorter than the posterior. Scales in 15 rows. Ventrals | 
180-237 ; anal divided (rarely entire); subcaudals 30-59. Body 
annulate, black and red or black, yellow, and red; tail annulate 
black and yellow ; snout black; parietal shields usually entirely or 
greater part yellow, the first black annulus just behind or 
encroaching a little upon the parietals. 
Total length 990 millim. ; tail 85. 
Eastern North America, from Southern Virginia, the Ohio River, 
and the Missouri to the Rio Grande ; Mexico; Central America. 
