44. BooDON. 329 



2. Scales in 25 to 31 rows. 



a. Two pairs of chin-shields, in contact with each other. 



Parietal shields longer than the distance 



between the frontal and the end of 



the snout 6. lineatus. p. 332. 



Parietal shields as long as the distance 



between the frontal and the end of 



the snout ; 7. faliyinosus, p. 334. 



h. Only one pair of chin-shields meeting on the median line. 



8. mentalis, p. 335. 



II. Subcaudals single 9. olivaceus, p. 335. 



1. Boodon lemniscatus. 



Bosedon lemniscatum, Bum. ^ Bibr. vii. p. 365 (1854) ; Jan, Icon. 

 Qin. 36, pi. iii. fig. 1 (1870; ; Blanf. Geol. Sf Zool. Abyss, p. 457 



Eve small. Eostral broader than deep, scarcely visible from 

 above ; internasals subtriangular, shorter than the prsefrontals ; 

 frontal twice as long as broad, longer than its distance from the end 

 of the snout, as long as the parietals ; loreal longer than deep ; one 

 praeocular, not extending to the upper surface of the head ; two (or 

 three) postoculars ; temporals 1-1-2; eight upper labials, third, 

 fourth, and fifth entering the eye ; three or four lower labials in 

 contact with the anterior chin-shields, which are much longer than 

 the posterior. Scales in 21 or 23 rows. Ventrals 194-200 ; anal 

 entire ; subcaudals 41-60. Pale brown above ; a dark vertebral 

 band, extending to the end of the snout and forming a loop on the 

 crown ; a dark lateral band, three or four scales wide on the body, 

 also extending to the end of the snout, passing through the eye ; 

 lower parts yellowish, with brown dots, which may form a streak 

 along each side of the belly, and one along the middle of the tail. 



Total length 800 millim. ; tail 110. 



Abyssinia. 



a-b. 6 (Sc. 21 ; V. 200 ; C. 55) Ashangi. W. T. Blanford, Esq. 



&?(Sc. 21: V. 197;0. 41). [P.]. 



c. cf (So. 21 ; V. 194; C. 60). Abyssinia. W. Jesse, Esq. [C.]. 



2. Boodon geometricus. 



Lycodon geometricus, Schleg. Phys. Serp. ii. p. Ill (1837). 



Eugnathus geometricus, Item. <f- Bibr. vii. p. 406 (1854). 



Boaedon geometricum, Jan, Blenco, p. 95 (1863), and Icon. Gen. 36, 



pi. iii. tig. 2 (1870) ; Peters, Beise n. Mossamb. iii. p. 134 (1882) ; 



Bouleng. Ann. Mus. Genova (2) xii. 1891, p. 14. 

 Boodon seycheUensis, Giinth. Ann. ^ Mag. N. H. (6) i. 1888, p. 330, 



pi. xviii. fig. C. 



Eye rather small. Eostral broader than deep, just visible from 



