232 COLXTBEID^. 



y 1. Xenopholis scalaris. 



Elapomorphus scalaris, Wttcherer, Proc. Zool. Soc. 1861, p. 325 ; 



Strauch, Bull. Ac. St. PStersb. xxix. 1884, p. 673. 

 Xenopholis braconnieri, Peters, Mon. Perl. Ac. 1869, p, 441, pi. — . 



fig. 8. 

 Gerrhosteus prosopis, Cope, Proc. Ac. PMlad. 1874, p. 71. 



Eostral slightly broader than deep, hardly visible from above; 

 internasals smaU ; praefrontal 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 ; prseocular 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 1+2 ; 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. 



BrazU, Bolivia, Eastern Ecuador. 



a. 3 (V. 129; 0.34). Bahia. Dr. 0. Wucherer [0.]. 



(Type.) 



b. $ (V. 141 ; 0. 28). Yungas, Bolivia. 



c. $ (V. 188 ; C. 34). Canelos, E. Ecuador. Mr. C. Buckley [0.]. 



188. APOSTOLEPIS. 



Calamaria, part., Schkg. Phys. Serp. ii. p. 26 (1837). 

 Elapomorphus, part., I)um. 8r Bibr. Mem. Ac. Sc. xxiii. 1853, p. 489, 



and Erp. 6en. vii. p. 832 (1854) ; Jan, Arch. Zool. Anat. Phys. 



ii. 1862, p. 41 ; Strauch, Bull. Ac. St. PStersb. xxix. 1884, p. 649. 

 Apostolepis, Cope, Proc. Ac. PMlad. 1861, p. 524. 

 Khynchonyx, 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 prsefrontals ; nostril in a single nasal; no 

 loreal ; no anterior temporal. Body cylindrical. Scales smooth, 

 without pits, in 15 rows ; ventrals rounded. Tail short, obtuse ; 

 Bubeaudals in two rows. 



South America. 



* The type specimen of Xenopholis braconnieri is anomalous in having the 

 prsefrontal split up into three shields. 



