232 COLUBRID. 
1, Xenopholis scalaris. 
Elapomorphus scalaris, Wucherer, Proc. Zool. Soc. 1861, p. 325; 
Strauch, Bull. Ac. St. Pétersb. xxix. 1884, de 573. 
Xenopholis braconnieri, Peters, Mon. Berl. Ac. 1869, p. 441, pl. —. 
8 
fig. 3. 
Gerrhosteus prosopis, Cope, Proc, Ac. Philad. 1874, p. 71. 
Rostral slightly broader than deep, hardly visible from above; 
internasals small; prefrontal large *; frontal large, as broad as 
long, nearly as long as its distance from the end of the snout, much 
shorter than the parietals ; supraocular small; nasal large ; loreal 
longer than deep; procular single, larger than the supraocular, 
extending to the upper surface of the head and forming an extensive 
suture with the frontal; two postoculars, lower in contact with the 
anterior temporal; temporals 142; eight upper labials, fourth and 
fifth entering the eye; four lower labials in contact with the 
anterior chin-shields, which are longer than the posterior. Scales 
in 17 rows. Ventrals 128-141; anal entire; subcaudals 28-39. 
Pale brown above, with a dark brown vertebral line separating 
large blackish-brown transverse spots or cross-bands; upper lip 
and lower parts yellowish white. 
Total length 330 millim. ; tail 55. 
Brazil, Bolivia, Eastern Ecuador. 
a. dg (V. 129; 0.34). —_ Bahia. Dr. 0. Wucherer [C.}, 
(Type.) 
b. 2 (V. 141; ©. 28). Yungas, Bolivia. 
ce. 2 (V. 1388; 0.34). Canelos,E. Ecuador. Mr. C. Buckley [C.]}. 
188. APOSTOLEPIS. 
Calamaria, part., Schleg. Phys, Serp. ii. p. 25 (1837). 
Elapomorphus, part., Dum. § Bibr. Mem. Ae. Se. xxiii. 1853, p. 489, 
and Erp. Gén, vii. p. 832 (1854); Jan, Arch. Zool. Anat. Phys. 
ii. 1862, p.41; Strauch, Bull. Ac. St. Pétersb. xxix. 1884, p. 549. 
Apostolepis, Cope, Proc. Ac. Philad. 1861, p. 524. 
ynchonyx, Peters, Mon. Berl, Ac. 1869, p. 487. 
Maxillary very short, with four or five small teeth, followed, 
after a short interspace, by a pair of large grooved fangs situated 
below the eye; mandibular teeth subequal. Head small, not 
distinct from neck ; eye small or minute, with round pupil; inter- 
nasals fused with the prefrontals; nostril in a single nasal; no 
loreal ; no anterior temporal. Body cylindrical. Scales smooth, 
without pits, in 15 rows; ventrals rounded. Tail short, obtuse ; 
subcaudals in two rows, 
South America, 
* The type specimen of Xenopholis braconnieri is anomalous in having the 
prefrontal split up into three shields, 
