171. rSAMMOPHIS. 161 



k. Yg. (V. 158 ; 0. E. Central Africa. Dr. Livingstone [0.1 j 



100). Lord Russell [P.]. 



;. ? (V. 168 ; C. ?). Zambesi Expedition. Sir J. Kirk [0.]. 



7. Psammophis bocagii. (Plate VIII. fig. 1.) 



Psammopliis sibilans, var. A, Socage, Herp. Angola, p. 116 (1895). 

 bocagii, Bovieng. Proa. Zool. Soo, 1895, p. 538. 



Snout nearly twice as long as the eye. Eostral as deep as broad, 

 visible from above ; nostril between two shields ; internasals half 

 as long as the prsefrontals ; 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 preeocular, 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 Ijrown, 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. cJ (V. 166 ; 0. 112). Benguella. Prof. B. du Bocage [P.], 



8. Psammophis sibilans, 



Seba, Thes. ii. pi. Ivi. fig. 4 (1735) ; Linn. Amcen. Acad. i. p. 302 



(1749) ; LacSp. Serp. ii. p. 246, pi. xii. fig. 1 (1879). 

 Coluber sibilans, part., Linn. S. N. i. p. 383 (1766). 



moniliger, Daud. Rept. vii. p. 69 (1803). 



auritus, /. Geoffr. Descr. Egypte, Rept. pp. 147, 151, pi. viii, 



fig. 4 (1827), and Suppl. pi. iv. fig. 5 (1829). 

 Psammophis sibilans, Boie, Isis, 1827, p. 547 ; Jan, Icon. G4n.yl. iii. 



fig. 3 (1870) ; JBoettg. Abh. Senck. Ges. xii. 1881, p. 395, and 



Ber. Senck. Gei. 1887-88, p. 63 ; Boulenger, Proc. Zool. Soc. 1896, 



p. 538. 

 Coluber phillipsii, Hallow. Proc. Ac. Philad. 1844, p. 169. 

 Psammophis moniliger, part., Schleg. Phys. Serp. ii. p. 207, pi. viii. 



figs. 4 & 5 (1837) ; Bum. ^ Bibr. vii. p. 891 (1854). 

 phillipsii, Hallow. Proc. Ac. Philad. 1854, p. 100, and 1857, 



p. 69; Ccype, Proc. Ac. Philad. 1860, p. 654; F. MuU. Ferh. Nat. 



Ges. Basel, vii. 1885, p. 686. 

 irregularis, Fischer, Abh. Nat. Ver. Hamb. m. 1856, p. 92, 



pi. ii. fig. 4 ; Gilnth. Cat. p. 137 (1858) ; A. Dum. Arch. Mus. x. 



1859, p 208, pi. xvii. fig. 9 ; Jan, I. c. pi. iv. figs. 1 & 2. 

 VOL. in. '^ 



