58 Contribution towards the knowledge of snakes in Brazil 
lower labial scarcely im contact with the posterior chin-shields. 
Scales smqoth without apical pits, in 17 rows. Ventral 236. Anal 
divided. Subcaudals 21 pairs. 
Head dark brown above and below inclusive the throat; yellow- 
ish-white above with two dark longitudinal streaks running on 
either side from the nape to almost the extremity of the tail. 
The lIst. streak which is dark brown, narrow and dotted, runs 
on the nape on the border of the 4th. and 5th. rows of scales 
and on the body on the 4th. row, gradually passing to the 3rd. 
and nd. rows as it reaches the tail. The 2nd. streak of the 
same color while ininterrupted, is much bProader and covers 
the “th. the internal half of the 'Gth. and external border of 
the 8th. rows of scales. The two streaks touch each other slightly 
on the nape amd disappear on the head which is of the same 
color. Vertebral region, sides and belly yellowish white and 
unspotted; tail entirely dark brown from the junction of iis middle 
third with the posterior up to its extremity. 
Dimensions — Total length 620 mm.; tail 33 mm. 
Habitat — State of Piauí. 
Type — N.º 1.681 of the Butantan Institute snake collection, 
found in Engenheiro Dodt, Municipality of Santa Filomena, by 
MR. FRANCISCO DE ASSIS IGLESIAS, Agronomic Engineer, between 
1916 and 1918 and received in October 1918. 
Variations — Three other specimens of the same species from 
the same locality and also collected by Mr. FRANCISCO IGLESIAS 
were examined. 
Variations found were as follows; Ventrals 214-233 (& q : 214- 
215; 2 : 233); Anal divided. Subcaudals 20-26 (& q :25-26; 9 : 20). 
N.º 1.680-(4) — The diameter of the eye about 1/, of its 
distance from the mouth; rostral portion visible from above little 
longer than its distance from the frontal; a small anomalous scale 
above the postocular; 5th. lower labial separated from the pos- 
terior chin-shield. Ventrals 215; subcaudals 26 pairs. 
N.º 1.682 (young &') -— The diameter of the eye a little less 
than half its distance from the mouth; portion of rostral visible 
from above a little longer than its distance from the frontal; 
ôth, lower labial separated from the posterior chin-shield. Ventrals 
233; subcaudals 20/21. 
N.º 1.683(young £) — The diameter of the eye a little less 
than half its distance from the mouth; portion of rostral visible 
from above a little longer than its distance from the frontal; 
ôth, lower labial separated from the posterior chin-shield. Ventrals 
223; subcaudals 20/21. 
Apostolepis polylepis is casily distinguished from A. ambinigra 
(PETERS), A. erythronota (PETERS), A. intermedia KosLOWSKY (º), 
(9º) J. KosLowsky — Revista del Museu de La Plata, 1898, vol. VIII, p. 30; pl. 1; fig. 4-7. 
