Head narrow and elongate; rostral broader than deep, visible 
from above; internasals as long as deep or a little longer, as ‘ong 
as the prefrontals or a little shorter; frontal narrow, bell-shaped, 
about twice as long as broad, a little longer than its distance from 
the end of the snout, as long as the parietals ; Joreal much longer 
than deep; one pree- and two (rarely three) posioculars; temporals 
1+2 (rarely 24+2); eight upper labials, fourth and fifth entering 
the eye; four or five lower labials in contact with the anterior chin- 
shields, which are much shorter than the posterior. Scales in 19 
rows. Ventrals 188-203; anal divided (rarely entire); subcaudals 
81-111. Dark brown above, with two yellowish stripes two or 
three scales wide; head with or without light marblings; upper 
lip yellow; lower parts yellowish or pale olive, the lateral ventral 
keel -vitn a more or less distinct dark line ; chin and throat with or 
without olive marblings. ; 
Total length 1110 millim.; tail 285. 
Madagascar. 
a, 3(V. 200; C. 93). Madagascar. Dr. J. E. Gray [P.]. 
B, @ 9 (V. 195, 196; Madagascar. 
96, ?). 
d,e. 9 wv. 198, 198; Near Tamataye. Rey. W. D. Cowan 
C. 97, 100). [C.}. 3 
f. 2 (V. 203; €.106). —_Betsileo, “ie W. D. Cowan 
g-h. & (V. 201, 195; —“ Imerina, Rev. 4. Baron [C.}. 
0. 111, 106 
). 
k. g (V.192; C.93)& East Imerina. Rev. R. Baron [C.}. 
9(V. 188; C. 81). 
2. Dromicodryas quadrilineatus. 
Herpetodryas quadrilineatus, Dum. § Bibr. vii. ps 212 (1854). 
—— bernieri, var. quadrilineatus, Jan, Icon. Gén. 31, pl. iv. fig. 2 
(1869) ; Boettg. Abh, Senck. Ges. xi, 1877, p. 9, xi. 1879, p. 463, 
and xii. 1881, p. 443. 
—— bernieri, var. trilineata, part., Boettg. ll. cc. 
This form is very closely allied to the p.eceding, of which it has, 
in fact, been regarded as a variety. However it differs, in addition 
to the very striking coloration, in having a less narrow head. 
Ventrals 198 to 216; subcaudals 108 to 122. Pale olive above, 
wth a pair of black dorsal stripes (which may be confluent in 
the var. trilineata) and a narrower lateral one, which gradually 
disappears on the posterior part of the body and is altogether 
absent on the tail; head and nape dark brown or blackish above, 
with six yellowish spots (disposed ree? ), the anterior pair on the 
parietal and secord temporal shields, the second behind the parietals, 
and the third just in front of and sometimes confluent with the 
lateral dorsal stripes; lower parts yellowish, with an interrupied 
dark line along each jateral ventral keel:  _ 
Total length 102({millim.; tail 300.  ~ 
Madagascar. 
