166 COLUBRID. 
from above; nasals sometimes entire or semidivided; internasals 
nearly as long as broad, as long as the prefrontals; frontal narrow, 
nearly twice as long as broad, with concave sides, slightly longer 
than its distance from the end of the snout, as long as the parietals ; 
loreal a little longer than deep; one or two prx- and two post- ° 
oculars; temporals 14+2; eight upper labials, fourth and fifth 
entering the eye; five lower labials in contact with the anterior 
chin-shields, which are as long as or a little longer than the 
posterior. Scales in 19 rows. Ventrals 186-198; anal divided ; 
subcaudals 75-92. Length of tail 4 to 43 times in the total length. 
Pale buff above, with two alternating series of large black spots ; 
a broad black stripe from the eye to the side of the neck; upper lip, 
two or three outer rows of scales, and lower surface white. 
Total length 740 millim. ; tail 170. 
Western Argentina, 
a-b. g (V.198; C. 86) & Mendoza. 
(V. 193; C. 75). 
c-f. o (V. 196, 197, 186; Tucuman. 
C. 86, 92, 82) & yg. 
GVi1875C.76). 
7. Rhadinea cobella. 
Coluber cobella, Linn. Mus. Ad. Frid, p. 24 (1754), and S. N. i. 
p- 878 (1766); Merr. Beitr. i. p. 16, pl. iv., and ii. p. 32, pl. viii. 
1790). 
Elyps cobella, Schneid. Hist. Amph. i. p. 296 (1801). 
Coluber cenchrus, Daud. Rept. vil. p. 189 (1803). 
serpentinus, part., Daud. l. ¢. p. 87. 
Coronella cobella, Schley. Phys. Serp. ii. p. 63, pl. i. figs. 4 & 5 
1837). 
Lisphi cobella, Dum. § Bibr. vii. p. 698 (1854); Giiinth. Cat. p. 43 
(1858) ; Jan, Icon. Gén. 16, pl. v. fig. 1 (1866). 
Ophiomorphus cobella, Cope, Proc. Ac. Philad. 1862, p. 75. 
Liophis teniogaster, Jan, Arch. Zool. Anat. Phys. il. 1868, p. 292, 
and Icon. Gén. 18, pl. i. (1866). 
Eye rather small. Rostral broader than deep, visible from above ; 
internasals as long as broad or a little broader, as long as or a 
little shorter than the prefrontals ; frontal once and a half to once 
and three fourths as long as broad, as long as or slightly longer than 
its distance from the end of the snout, a little shorter than the 
parietals ; loreal as long as deep or deeper than long; one prie- and 
two postoculars; temporals 1+2; eight upper labials, fourth and 
fifth entering the eye; five lower labials in contact with the anterior 
chin-shields, which are as long as or a little Yonger than the 
posterior. Scales in 17.rows. Ventrals 143-163; anal divided ; 
subeaudals 45-57. Length of tail 43 to 6 times in the total 
length. Brown or blackish above, with whitish lines or cross bands ; 
belly yellowish (coral-red in life) with transverse black spots 
or cross bands, always more or less marked in the young, which 
have a blackish nuchal collar edged behind with whitish, and a 
