171. PSAMMOPHIS. 161 
k. Yg. (V. 158; OC.  E. Central Africa. Dr. Livingstone fo.) 
100 ; Lord Russell [P.]. 
1. 2 (V. 168; C. ?). Zambesi Expedition. Sir J. Kirk [C.]. 
7. Psammophis bocagii. (Pxrare VIII. fig. 1.) 
Psammophis sibilans, var. A, Bocage, Herp. Angola, p. 115 (1895). 
—— bocagii, Bouleng. Proc. Zool. Soc, 1895, p. 538. 
Snout nearly twice as long as the eye. Rostral as deep as broad, 
visible from above; nostril between two shields ; internasals half 
as long as the prefrontals; frontal rather more than twice as long 
as broad, much narrower in the middle than the supraocular, 
longer than its distance from the end of the snout, as long as the 
parietals ; loreal twice as long as deep; one preocular, not quite 
reaching the frontal; two postoculars; temporals 1+2, 2+2, or 
2+3,; nine upper labials, third deeper than second and fourth, 
fourth, fifth, and sixth entering the eye; four or five lower labials 
in contact with the anterior chin-shields, which are shorter than 
the posterior. Scales in 17 rows. Ventrals 161-173; anal 
divided; subcaudals 109-127. A broad reddish-brown, black- 
edged vertebral band, seven scales broad, separated from the 
sides, which are grey or reddish brown, by a yellow streak; 
a black line along the middle of the outer row of scales ; head with 
rather indistinct yellow, black-edged cross-bars ; a black line along 
the upper border of the labials, which are dotted with black ; lower 
half of outer row of scales and lower parts pale yellow, with a 
black line on each side. 
Total length 820 millim.; tail 295. 
Angola. 
a. dg (V. 166; C. 112). Benguella. Prof. B. du Bocage [P.]. 
8. Psammophis sibilans. 
Seba, Thes. ii. pl. lvi. fig. 4 (1735) ; Linn. Amen. Acad. i. p. 302 
(1749) ; Lacép. Serp. ii. p. 246, pl. xii. fig. 1 (1879). 
Coluber sibilans, part., Linn. S. NV. i. p. 885 (1766). 
—— moniliger, Daud. Rept. vii. p. 69 (1803). 
——auritus, I. Geoffr. Descr. Egypte, Rept. pp. 147, 151, pl. viii. 
fig, 4 (1827), and Suppl. pl. iv. fig. & (1829). 
Psammophis sibilans, Bove, Isis, 1827, p. 547; Jan, Icon. Gén. pl. iii. 
fig. 3 (1870); Boettg. Abh. Senck. Ges, xii. 1881, p. 395, and 
Ber. Senck. Ges. 1887-88, p.58; Boulenger, Proc. Zool. Soc. 1895, 
. 588, 
Coluber phillipsii, Hallow. Proc. Ac. Philad. 1844, p. 169. 
Psammophis moniliger, part., Schleg. Phys. Serp. ii. p. 207, pl. viii. 
figs. 4 & 5 (1837) ; Dum. § Bidr. vii. p. 891 (1854). 
—— phillipsii, Hallow. Proc. Ac. Philad. 1854, p. 100, and 1857, 
p- 69; Cope, Proc. Ac. Philad, 1860, p. 554; F. Mill. Verh. Nat. 
Ges. Basel, vii. 1885, p. 686. 
—— iregularis, Fischer, Abh. Nat. Ver. Hamb, ili. 1856, p. 92, 
L. ii. fig. 4; Gtinth. Cat. p. 187 (1858); A. Dum. Arch. Mus. x. 
859, p 208, pl. xvii. fig. 9; Jan, J. ¢. pl. iv. figs. 1 & 2. 
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