378 COLUBRID. 
C. Uniform black (sides and under surface of head excepted). 
a. do (Se. 2; V. 207; Coast of Guinea. 
C. 60). 
D. Anterior half of body pale brown above and white beneath, 
with blackish annuli, which are broader on the back ; posterior 
part of body and tail black. 
a. Yg. (Se. =; V. 208; Gambia. J. Mitchell, Esq. [P.]. 
C. 70). 
E. Brown above, with small black spots; uniform yellowish 
beneath. 
a. 3 (Se. ai V. 207; Oil River. Sir H. H. Johnston 
C. 66). [P.]. 
b, Ad., skin (Se. 2; V. Shiré Valley, Brit. 
208 ; C. 65). C. Africa. 
4. Naia nigricollis. 
Vipera haje, part., I. Geoffr. Descr. Egypte, Rept. pl. vii. fig. 3 
1827). 
Naja nigricollis, Reinh. Vidensk. Selsk. Skrift. x. 1848, p. 269, pl. iii. 
figs. 5-7 ; Bocage, Jorn. Sc. Lisb, i. 1866, pp. 51 & 71, pl. i. fig. 4; ” 
Peters, Mon. Berl. Ac. 1867, eS 237; Jan, Icon. Gén, 45, pl. i. 
fig. 1 (1874); Peters, Reise n. Mossamb. iii. p. 138, pl. xx. figs. 9 
& 10 (1882) ; Mocg. Bull. Soc. Philom. (7) xi. 1887, p.83; Boettg. 
Ber. Senck. Ges. 1888, p. 81; Stejneger, Proc, U.S. Nat. Mus. 
xvi. 1893, p. 734; Bouleng. Ann. §& Mag. N. H. (6) xvi. 1895, 
p. 168 ; Bocage, Herp. a tee 135 (1895). 
—— mossambica, Peters, Mon. Berl, Ac. 1854, p. 625. 
—— nigricollis, var. crawshayi, Giinth, Proc. Zool. Soc. 1893, p. 620. 
Eye moderate, two fifths to one half the length of the snout in 
the adult. Rostral once and a half as broad as deep, the portion 
visible from above measuring one third to one half its distance from 
the frontal ; internasals as long as or shorter than the prefrontals, 
in contact with or narrowly separated from the preocular; frontal 
once and one fifth to twice as long as broad, as broad as or narrower 
than the supraocular, as long as or shorter than its distance from 
the end of the snout, shorter than the parietals; two (rarely one) 
pre- and three postoculars; temporals 2 or 3+4 or 5; six (rarely 
seven) upper labials, third (or third and fourth) deepest and entering 
the eye, last longest; four lower labials in contact with the anterior 
chin-shields ; posterior chin-shields narrow, as long as or longer 
than the anterior, and widely separated from each other. 21-29 
scales across the neck, 17-25 across the middle of the body. 
Ventrals 183-228; anal entire; subcaudals 55-68, . Coloration 
very variable. 
Total length 2000 millim, ; tail 300. 
Africa, from Senegambia and Upper Egypt to Angola and the 
Transvaal, 
