258 



COLUBEID^. 



Aparallaotus concolor, Bouleng. Ann. ^ Mag. N. H. (6) xyi. 1895, 

 p. 172. 



Diameter of eye equal to or greater than its distance from the 

 oral margin. Eostral broader than deep, the portion visible from 

 above one half to two thirds as long as its distance from the 

 frontal ; internasals shorter than the praefrontals ; frontal once and 

 a half to twice as long as broad, much longer than its distance from 

 the end of the snout, as long as or slightly shorter than the 

 parietals ; nasal entire, not in contact with the preeocular ; one 

 postocular ; temporals 1 + 1 ; seven upper labials, third and fourth 

 entering the eye, second in contact with the prsefrontal, fifth in 

 contact with the parietal; first lower labial in contact with its 

 fellow behind the symphysial ; two pairs of chin-shields, posterior 

 longest, anterior in contact with four labials. Scales in 15 rows. 

 Ventrals 145-158 ; anal entire ; subcaudals 55-71. Uniform dark 

 brown or black, somewhat lighter beneath. 



Total length 460 millim. ; tail 110. 



Eastern Central Africa. 



a. $ (V. 152; 0. 55). Lado. Dr. Emin Pasha [P.]. 



i. Hgr. (V. 145 ; 0.61). Steppes E. of Izavo. Dr. J. W. Greg'ory 



[P.]. 

 c. 5 (V. 158; 0. 71). Boran Country. Dr. Donaldson Smith 



[C.]. 



4. Aparallactus lunnlatus. 



Uriechis lunulatus, Peters, Mon. Berl. Ac. 1854, p. 623, and Reise n. 



Mossamb. iii. p. 113, pi. xviii. fig. 2 (1882) ; Gunth. Ann. & Maq. 



N. H. (6) i. 1888, p. 324. 

 Aparallactus lunulatus, Bouhng. Ann. Sp Mag. N. H. (6) xvi. 1896, 



p. 172. 



Diameter of eye equal to or greater than its distance from the 

 oral margin. Rostral broader than deep, the portion visible from 

 above measuring about one third its distance from the frontal ; 

 internasals shorter than the praefrontals ; frontal once and two 

 thirds as long as broad, much longer than its distance from the end 

 of the snout, as long as the parietals ; nasal divided, in contact 

 with the preeocular ; one postocular ; temporals 1 + 1 ; seven upper 

 labials, third and fourth entering the eye, fifth in contact with the 

 parietal ; first lower labial in contact with its fellow behind the 

 symphysial ; two pairs of chin-shields, subequal in size, the anterior 

 in contact with four lower labials. Scales in 15 rows. Ventrals 

 151-158 ; anal entire ; subcaudals 52-58. Olive or pale brown 

 above, each scale edged with darker, anteriorly with several 

 blackish cross-bars followed by small spots ; the first cross-bar 

 largest and forming a collar ; whitish beneath. 



Total length 390 millim. ; tail 85. 



Eastern Central Africa, Mozambique. 



a. S (V. 155 ; 0. 52). Lake Tanganyika. Sir J. Kirk [C.l. 



b. S (V. 161 i C. 57). Lake Nyassa. 



