378 MR. G. A. BOULENGER ON THE 



Scales smooth, in 25 to 29 rows ; ej'e separated from the labials bj^ 



suboculars Eteirod 



2. Body compressed ; scales smooth, in 17 to 25 rows. 



Snout rounded Stennphis. 



Snout much depressed, broad, truncate .'.. Lycodryas. 



II. Prefrontal in contact with upper labials, separating the 

 loreal from the prteocular; nasal entire or semidivided ; 

 scales in 17 rows Ilimophis. 



1. Geobipsas. 

 Bouleng. Cat. Sn. iii. p. 32. 



Two species : — 



A single loreal ; ventrals 172-189 ; subcaudals 55-76 G. mfralineata. 



Two superposed loreals ; ventrals 137; subcaudals 31 G. boulengeri. 



1. Geodipsas infralineata. 



Tachymenis infralineatus Giinth. Ann. & Mag. N. H. (5) ix. 

 1882, p. 265. 



Geodipsas infralineata Bouleng. 1. c. pi. iii. fig. 1. 

 Madagascar. 



2. Geodipsas boulengeri. 



Tachjmenis boulengeri Peracca, Boll. Mus. Torin. vii. 1892, 

 no. 112, p. 3. 



Geodipsas boulengeri Bouleng. 1. c. 

 Madagascar. 



2. Ithycyphus. 



Giinth. Ann. & Mag. N. H. (4) xi. 1873, p. 374 ; Bouleng. Cat. 

 Sn. iii. p. 34. 



Two species : — 



Praeocular in contact with frontal ; loreal tviice to thrice as long as 



deep ; three post oculars I. goudoti. 



Praiocular not reaching frontal ; loreal once and a half to twice as 



long as deep ; two (rarely three) postoculars I. miniatus. 



1. Ithycyphus goudoti. 



Herpetodryas goudoti Schleg. Piiys. Serp. ii. p. 187. 



Ithycyphus goudoti Bouleng. 1. c. 



Madagascar. 



2. Ithycyphus miniatus. 



Coluber miniatus Schleg. t. c. p. 148. 

 Ithycyphus miniatus Bouleng. t. c. p. 35^ 

 Madagascar ; Comoro Islands. 



