INNOCUOUS SERPENTS. 
157 
The late M. Khul has referred to our Dendrophis 
piCTA a serpent of Yemen, described by Forskal, Descr,^ 
p. 14, under the name of Col. Shokari. I cannot venture 
to appropriate this description, which rather seems to me 
to be drawn from an unknown Ophidian,, intermediate be- 
tween the PsAMMOPHis and the Dendrophis : that of Khul 
is drawn from the Dendrophis picta. — Part ii. 
DRYIOPHIS 
Is the second genus of Tree- Snakes. They are easily 
distinguished by their extremely lengthened muzzle, which 
is most generally drawn out to a point more or less salient. 
Their forms are very slender, the trunk very compressed, 
and the abdomen convex ; most of them have either green 
tints, or the colour of bronze. The upper jaw ordinarily is 
provided with several teeth posteriorly, and in the middle, 
which are much developed and grooved. The scales have 
often a linear form, and the abdominal plates are very high. 
The eye is not large ; in the first species the pupil is trans- 
versely elongated. This genus comprehends the true 
Tree-snakes, which inhabit the intertropical regions of 
Asia and the two Americas. We may establish in this 
genus two geographical subdivisions. 
A. The Dryiophis of the Ancient World. 
Dryiophis, properly so called, have the maxillary teeth 
grooved, and the pupil of the eye horizontally elongated. 
1. Dryiophis Nasuta. Found from Malabar and 
Ceylon to the Marianne and Philippine Islands. Scales 
smooth, of the dorsal range rather large ; rostral plate 
prolonged into a point ; grass-green ; below paler ; a 
yellow ray extends along the sides of the abdomen and 
the tail. S. 180+163. 
2. Dryiophis Langaha. A curious serpent of Mada- 
gascar. Muzzle prolonged in a fleshy appendix, half an 
inch in length, often sharp pointed, and sometimes com- 
pressed and enlarged in the form of a leaf ; scales cari- 
