166. TRIMEBORHINtrS. 



139 



loreal as long as deep or a little longer than deep ; one prsBocular, 

 in contact with or narrowly separated from, the frontal ; two post- 

 oculars ; temporals 1 or 2+2 or 3 ; eight (rarely seven or nine) 

 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 longer than the posterior. Scales in 17 rows. Ventrals 140- 

 183; anal divided; suboaudals 62-79. Coloration very variable. 

 Greyish, yellowish, or pale olive-brown above, with brown black- 

 edged markings, which may form three or four longitudinal series 

 of round or rhomboidal spots or be partially or entirely confluent 

 into three undulous or straight longitudinal bands; a yellow 

 vertebral line sometimes present ; a dark band on each side of the 

 head, passing through -the eye, widening behind and often joining 

 its fellow on the occiput, sometimes broken up into spots ; upper 

 lip yellowish white, uniform or with black spots ; tail with three 

 dark stripes ; lower parts white, dotted or spotted with bluish grey 

 or black. 



Total length 850 millim. ; tail 170. 



South Africa. 



«-e. $ (V. 160, 149, 

 151 ; C. 71, 68, 71) 

 &yg.(V.152,ie2; 

 C. 70, 69). 



/. Hgr. (V. 153; 

 0. 77). 



ff-i. d(V.142;C.70), 



5 (V.148; 0.67), 



6 yg. (V. 161; 

 0. 72). 



h-l. tJ (V. 162, 156 ; 



0. ?, 71). 

 m. 5 (V. 171 ; 0. 66). 



n. Hgr. (V. 160; 



C. 66). 

 0. ? (V.177; C. 62). 



p-v, w-a. cJ (V. 157, 

 147; C.69, 68), ? 

 (V. 155, 159, 154, 

 170, 172, 176, 162, 

 153),&hgr.(V.171, 

 151 ; 0. 75, 69). 



ft y. SkuUs. 



Cape of Good Hope. 



Cape of Good Hope. 

 Simon's Bay. 



Port Elizabeth. 



Port Natal. ; 



Johannesburg, Transvaal. 



Humbe, Angola. 



S. Africa. 



S. Africa. 



Eev. G. H. E. Fisk 

 H.M.S. ' Challenger.' 



Mr. J.L. Drege[P.]. 



Rev. H. Callaway 



[P.]. 

 Rev. G. H. R. Fisk 



[P.]. 

 Prof. Barboza du 



Socage [P.]. 



2. Trimerorhinus tritaeniatus. 



Rhagerrhis tritaeniata, Gilnth. Ann. Sr Mag. N. H. (4) i. 1868, 



p. 423, pi. six. fig. H ; Bocage, Serp. Angola, p. 110, pi. x a. tig. 1 



(1896). 

 Coronella tritsenia, Gunth. in Oates, Matahele Land, p. 829, pi. 



(1881). 

 Psammophylax tritseniatus, Peters, Seise n. Mossamb. iii. p. 119 



(1882). 



