1. cavsus. 467 
Snout prominent, more or less turned up 
at the end; scales in 17 rows ; ventrals 
113-125; subcaudals 10-18 ........ 3. defilippi, p. 469. 
II. Scales in 15 rows; subcaudals single. 4. Lichtensteinia, p. 470. 
1. Causus rhombeatus. 
Sepedon rhombeatus, Lichtenst. Verz. Doubl. Mus. Berl. p. 106 
(1823). 
Naja V-nigrum, Bove, Isis, 1827, p. 556. 
rhombeata, Schleg. Phys. Serp. ii. p. 483, pl. xvii. figs. 12 & 
13 (1837). 
spake maculatus, Hallow. Journ. Ac. Philad. viii. 1842, p. 337, 
pl. xix. 
Causus rhombeatus, Gray, Cat. p. 33 ( eg Dum. § Bibr. vii. 
p. 1263 (1854) ; Hallow. Proe. gr Philad. 1854, p. for, Peters, 
Reise n. Mossamb. iii. p. 144 (1882); Boettg. Ber. Senck. Ges. 
1887, p. 63, and 1888, p. 88; Stejneg. Proc. U.S. Nat. Mus. xvi. 
18983, p. 735 ; Bocage, Herp. ’ Angola, p- 145 (1895). 
Aspidelaps rhombeatus, Jan, Rev. § Mag. Zool. 1859, p.511 ; Beettg. 
Abh, Senck. Ges. xii. 1881, p. 399. 
Snout obtuse, moderately prominent. Rostral rounded, its upper 
portion forming a right or obtuse angle behind and measuring one 
haif to two thirds its distance from the frontal; internasals as long 
as or a little longer than the prefrontals, often forming a suture 
with the loreal; frontal once and a half to once and three fourths 
as long as broad, as Jong as or longer than its distance from the end 
of the snout, longer than the parietals ; two or three preoculars, 
one or two postoculars, and one or two suboculars separating the 
eye from the labials; temporals 2+3 or 4; six upper labials; 
three or four lower labials in contact with the anterior chin-shields ; 
posterior chin-shields small or indistinct. Scales in 17 to 21 rows, 
dorsals more or less distinctly keeled. Ventrals 120-155; anal 
entire ; subcaudals 15-29, all or greater part in pairs. Olive or 
pale brown above, rarely uniform, usually with a dorsal series of 
large rhomboidal or V-shaped dark brown spots which may be 
edged with whitish ; usually a large dark A-shaped marking on the 
back of the head, the point on the frontal, and an oblique dark streak 
behind the eye; labials usually dark-edged; lower parts yellowish 
white or grey, uniform or the shields edged with black. 
Total length 700 millim.; tail 75, 
Tropical and South Africa. 
a. 2 (Sc. 19; V. 181; C. 21). Gambia. Lord Derby a 
&. Yg. (Sc. 17; V. 188; C.17). Gambia. J. Pe sq 
P 
ec. 2 (Sc. 18; V. 186; C. 19). SS Gold = G. on Higlett, Esq. 
oast. 
d,e. Yg. (Sc. 21,18; V. 135, Gold Coast. W. TL “Evans, Esq. 
125 ; 5, 17, 21). [P.}. 
2u2 
