126 COLTJBEID^, 



snout, as long as or a little shorter than the parietals ; loreal as 

 long as deep or a little longer than deep ; one preeocular, extending 

 to the upper surface of the head but not reaching the frontal ; two 

 postoculars ; temporals 1+2 or 2 + 3; eight upper labials, fourth 

 and fifth entering the eye ; four or five lower labials in contact with 

 the anterior chin-shields, which are as long as or shorter than the 

 posterior. Scales in 17 rows, all smooth. Ventrals 154-187 ; anal 

 divided ; subcaudals 59-98. Greyish or pale brown above,, with two 

 series of small blackish spots connected by a dark vertebral line ; 

 the spots and bands unite on the occiput and nape and form a more 

 or less marked zigzag band ; a dark streak on each side of the head, 

 passing through the eye ; tail with three dark stripes : whitish or 

 pale brownish below, spotted or speckled with brown. 



Total length 355 millim. ; tail 85. 



Tropical Africa south of the Equator, East Africa. 



a. cJ (V. 187 ; 0. 73). Eios de Sena, Zambesi. Sir J. Kirk [C.l. 



(Type.) 

 6. cJ (V. 183; 0.77). Cape McLear, Lake A. A. Simons, Esq. 



Nyassa. [C.]. 



c. ? (V. 171 ; 0. 68). Lake Nyassa. J. B. Thelwall, Esq. 



[0.]. 



The specimen from Cafifraria referred by Peters to this species 

 (Reise n. Mossamb. iii. p. 118) is no doubt specifically distinct, as it 

 is stated to have 19 rows of scales and 137 ventrals. 



^ 



163. PSEUDABLABES. 



Maxillary teeth small, equal, 14, followed, after an interspace, by 

 a pair of enlarged grooved fangs situated just behind the posterior 

 border of the eye * ; mandibular teeth equal. Head small, scarcely 

 distinct from neck ; eye moderate, with round pupil ; nostril in a 

 single or semidivided nasal. Body cylindrical ; scales smooth, with 

 apical pits, in 13 rows; ventrals rounded. Tail moderate; sub- 

 caudals in two rows. 



Southern Brazil, Uruguay. 



1. Pseudablabes agassizii. 



and description, see Vol. ] 



Philodryas paucisquamis, Peters, Mon. Bet-l. Ac. 1863, p. 286. 



Eor synonymy and description, see Vol. II. p. 259 (Ooniia 

 agassizii), and add : — 



* These fangs, hidden in the gum, were overlooked by Jan and myself. 

 Their presence, first ascertained by Peters, has been pointed out to me by 

 Count Peracca. 



