171. PsAMMOPHIs. 159 
4, Psammophis punctulatus. 
Psammophis punctulatus, Dum. § Bibr. vii. p. 897 (1854) ; Peters, 
Reise n. Mossamb, iii. p. 123 (1882); Boettg. Zool. Anz. 1893, 
.119; Bouleng. Ann. Mus. Genova, (2) xv. 1895, p. 14, pl. iv. 
g. 1, and Proc. Zool. Soc. 1895, p. 587. 
Dendrophis furcatus, Biancont, Spec. Zool. Mosamb. p. 276, pl. xiii. 
(1859). 
Psammophis punctulatus, var. trivirgatus, Peters, Mon. Berl. Ac. 
1878, p. 206. 
Snout once and a half to once and two thirds as long as the eye. 
Rostral a little broader than deep, visible from above; nostril 
between two or three shields; internasals nearly half as long as 
the prefrontals; frontal nearly twice as long as broad, much 
narrower, in the middle, than the supraocular, as long as or a little 
longer than its distance from the end of the snout, as long as or 
slightly shorter than the parietals; loreal nearly twice to twice and 
a half as long as deep ; one preeocular, in contact with the frontal and 
with the third, fourth, and fifth upper labials ; two postoculars ; tem- 
porals 2+ 2 or 24+3; nine (exceptionally eight) upper labials, third 
deepest, fifth and sixth (or fourth and fifth) entering the eye, sixth 
(or fifth) largest, as long as the eye; five lower labials in contact 
with the anterior chin-shields, which are shorter than the posterior. 
Seales in 17 rows. Ventrals 177-190; anal divided; subcaudals 
130-158. Yellow or brownish white above, greenish or greyish on 
the sides and beneath, head and nape olive-grey or reddish, speckled 
with black; three black stripes along the body, the median broadest 
and bifurcating on the neck, its branches extending, as brown 
streaks, to the end of the snout after passing through the eyes; the 
stripes on the body may be reduced to the vertebral. 
Total length 1660 millim. ; tail 580. 
Arabia ; East Africa, from Somaliland to Mozambique. 
a. 3 (V. 185; C. 146). Ogaden, Somaliland. Capt. Bottego [C.]; 
arquis G. Doria 
[P.]. 
b. @ (V. 184; C. 186). Lake Rudolf. sal chee Smith 
5. Psammophis trigrammus. 
Psammophis trigrammus, Giinth. Ann. §& Mag. N. H. (3) xv. 1865, 
p. 95, pl. ii. fig. E; Bouleng. Proc. Zool. Soc. 1895, p. 538. 
Snout twice as long as the diameter of the eye. Rostral broader 
than deep, visible from above; nostril between three shields ; inter- 
nasals about half as long as the prefrontals ; frontal twice as long 
as broad, half as broad, in the middle, as the supraocular, as long 
as its distance from the end-of the snout, a little shorter than the 
parietals ; loreal thrice as long as deep; two preoculars, upper not 
quite reaching the frontal; two postoculars; temporals 1+1 or 
2+1; nine upper labials, third deeper than second and fourth, 
third, fourth, and fifth in contact with the preocular, fifth and sixth 
entering the eye; five lower labials in contact with the anterior 
