54, ZAMENIS. 409 



subocular ; four or five lower labials in contact with the anterior 

 chin-shields ; posterior chin-shields as long as the anterior, narrow 

 and separated from each other by two or three series of scales. 

 Scales smooth, in 25 (rarely 23) rows. Ventrals obtusely angulate 

 laterally, 214-232 ; anal divided or entire ; subcaudals 87-104. 

 Pale olive or greyish above, with three alternating series of blackish 

 transverse bars, and a series of black spots along each side of the 

 belly ; a more or less distinct blackish crescentic band on the nape, 

 extending to the sides of the throat ; a blackish spot below the eye ; 

 lower parts white. 



Total length 940 miUim. ; tail 230. 



Algeria and Tunisia. 



a. S (V. 215 ; A. 2 ; C. 99). Tozeur, Tunisia. M. F. Lataste [P.]. 

 6. Yg. (V. 214 ; A. 1 ; C. 92). Houmt-es-Souk, M. F. Lataste [P.J. 



Djerba, Tunisia. 

 c-d. c? (V. 218 ; A. 1 ; 0. 104) Duirat, Tunisia. Dr. J. Anderson [P.]. 



& ? (V. 231; A. 2; C. 87). 

 e. Yg. (V. 222 ; A. 2 ; 0. 99). ? 



27. Zamenis hippocrepis. 



Coluber hippocrepis, Linn. Mus. Ad. Frid. p. 36, pi. xvi. fig. 2 



(1754), and S. N. i. p. 388 (1766) ; Daud Mept. vi. p. 249 (1803) ; 



Bonap. Icon. Faun. Ital. (1885) ; Schleg. Phys. Serp. ii. p. 164, 



pL vi. figs. 15 & 16 (1837). 



domesticus, lAnn. S. N. i. p. 389 ; Daud. t. c. p. 242. 



Natrix hippocrepis, Laur. Syn. kept. p. 77 (1768). 



bahiensis, Wagl. in Spix, Serp. Ilras. p. 27, pi. x. fig. 1 (1824). 



Periops hippocrepis, Wagl. Icon. Ampli. pi. xxxi. (1830) ; Guichen. 



Exphr. Sc. Alg., Rept. p. 19 (1850) ; Bum. ^ Bibr. vii. p. 676 



(1854) ; Be Betta, Faun. Ital., Rett. Anf. p. 40 (1874) ; Schreib. 



Herp. Fur. p. 260 (1876) ; Jan, Icon. Qin. 48, pi. iv. fig. 1 (1876) ; 



Camerano, Mon. Ofid. Ital, Coluhr. p. 48 (1891). 

 Calopeltis hippocrepis, Eichw. N. Mim. Soc. Nat. Mosc. ix. 1851, 



p. 441. 

 Zamenis hippocrepis, Giinth. Cat. p. 103 (1858) ; Sirauch, Erp. 



Alg. p. 61 (1862) ; Boettg. Abh. Senck. Ges. ix. 1874, p. 157, 



xii. 1881, p, 374, xiii. 1883, p. 100, and in Kobelt, Beis. Alg. 



Tunis, p. 459 (1885) ; Bouleng. Tr. Zool. Soc. siii. 1891, p. 147. 

 Tyria hippocrepis, Cope, Free. Ac. Philad, 1862, p. 338. 



Snout feebly projecting, obtuse. Rostral once and one third to 

 once and a half as broad as deep, the portion visible from above 

 measuring about one third its distance from the frontal ; internasals 

 as long as or a little shorter than the praefrontals ; frontal con- 

 siderably broader than the supraocular, once and one fourth to 

 once and a half as long as broad, as long as or a little longer than 

 its distance from the end of the snout, shorter than the parietals, 

 and in contact with the prseocular ; loreal longer than deep ; one or 

 two praeoculars ; two postoculais ; a series of three or four sub- 

 oculars usually completely separates the eye from the labials ; 

 temporals 2-}- 3 or 34-3 ; eight or nine (rarely ten) upper labials. 



