Mr. G. A. Boulenger on new Snakes. 351 
visible from above; nostril in the upper part of an undivided 
nasal; internasals as long as broad; prefrontal semidivided ; 
frontal a little longer than broad, twice as broad as the supra- 
ocular, as long as its distance from the end of the snout, 
shorter than the parietals ; loreal longer than deep ; two pree- 
and two postoculars; temporals 1+2; ten upper labials, 
fifth and sixth entering the eye; four or five lower labials in 
contact with the anterior chin-shields; posterior chin-shields 
nearly as long as the anterior and separated from each other 
by scales. Scales in 17 rows, striated and feebly keeled, 
with minute granular asperities; the keels stronger on the 
tail. Ventrals 172; anal divided ; subcaudals 45. Olive- 
grey above, yellowish white beneath, the two colours sharply 
defined by a black line running along the third series of 
scales and extending to the eye. 
Total length 360 millim. ; tail 55. 
A single male specimen from the Man-Son Mountains, 
Tonkin, altitude 3000 to 4000 feet, collected by Hr. Fruh- 
storfer. 
Liophis bipreocularis. 
Hye rather small. Rostral much broader than deep, just 
visible from above; internasals broader than long, much 
shorter than the preefrontals ; frontal once and two thirds as 
long as broad, slightly longer than its distance from the end 
of the snout, a little shorter than the parietals; no loreal, 
posterior nasal in contact with the preeoculars ; two pre- and 
two postoculars; temporals 1+2; seven upper labials, 
third and fourth entering the eye; four lower labials in con- 
tact with the anterior chin-shields, which are a little shorter 
than the posterior. Scales in 17 rows. Ventrals 173; anal 
divided; subcaudals 62. Olive-brown above, with ill- 
defined blackish spots anteriorly ; posterior half of body 
with two black dorsal lines, separated by three series of 
scales, and a black lateral band; the two dorsal lines unite 
on the tail, which bears three black bands of equal width ; 
a subtriangular black blotch on each side of the nape, as 
usual in Tropidonotus natriz; upper lip white; lower parts 
pinkish, the ventrals with small blackish spots. 
Total length 530 millim. ; tail 110. 
A single female specimen from Facatative, Andes of 
Colombia, 8000 feet, collected by Mr. Kay Thomson. 
Simotes longicauda. 
Nasal divided ; portion of rostral visible from above as 
lone as its distance from the frontal; suture’ between the 
5S ‘ I 
