140 COLUBRID. 
Agrees in structural characters with 7. rhombeatus except in 
having a smaller eye, the diameter of which is less than its distance 
from the nostril. The rostral shield, which is as deep as broad, is 
wedged in between the nasals, but does not separate them behind ; 
its upper portion measuring at least half its distance from the 
frontal. Ventrals 149-170; subcaudals 53-66. Greyish or pale 
brown above, with two or three dark brown, black-edged bands 
originating on the head and extending to the end of the tail, the 
outer passing through the eye, the vertebral sometimes rather 
indistinct or absent; a fine yellowish line sometimes divides the 
vertebral band; the sides below the bands white, with a pale 
brown or red streak running along the outer row of scales; upper 
lip and lower parts white. 
Total length 740 millim. ; tail 150. 
Tropical Africa south of the Equator; East Africa, 
3 (V. 160; C. 60). S.E. Africa OyPe.) 
’. Ye .(V. 163; C.58). Waterberg District, Trans- L, Distant, Esq. 
vaal. 
oe (V. 152; C. 60). Pietersburg, Transvaal. CC. fr $ ones +. 
d. 2 (V. 162; C. 58). Matabeleland. F. Oates, Esq. [P.]} 
if of Corvndia tritenia. ) 
eg. o& (V. 160; LTlalamabeeli, Kalahari R. J. Cuninghame, 
O, 65) & 2 (V.162, Desert. Esq. [P.]. 
158; C. 56, 53). 
Ai. é ie 156, 149; Zomba, Brit. Central Sir H. H. Johnston 
Africa P.}. 
k-l. ° WW. 162, 150 ; Chiradzulu, Brit. Central si it H. Johnston 
i fnbay ty. 149; F sen B © tes Esq. [C.]. 
m. a f wambo rit. Central A. Carson 
C. 55). Africa. 
n-o. Q (V. 165, Mpwapwa, E, Central 
C. 66 Africa 
. Her. (V. 170; Kibibi Basin, E. Africa. Dr. J. W.-G 
P © 63), , ; ’ (P regory 
3. Trimerorhinus variabilis. 
Psammophylax variabilis, Giinth. Proc. Zool. Soc. 1892, p. 557, 
pl. xxxv. 
Agrees with 7’. triteniatus, but rostral shield slightly broader 
than deep, its upper portion measuring about one third its distance 
from the frontal. Ventrals 157-169; subcaudals 52-60. Pale 
olive to blackish above, uniform or with three dark, black-edged 
longitudinal bands and a fine yellowish vertebral line ; belly olive- 
to lead-grey. 
Total length 770 millim.; tail 130. 
Nyassaland., 
ad. 3 (V. 107; 0, 55) Shiré highlands. Sir H. H. Meigs 
8, ) a 8. 
168° 0.67, ?, 60). ' LE} (Type 
é. 2 (V. 162; 6.5 ). Zomba, Brit. Central Sir H. H. Johnston, 
Africa. [P.]. 
