380 mr. g. a. boulengee, on the 



6. Stenophis. 

 Bouleng. Cat. Sn. iii. p, 39. 



S>/nopsis of the Sjyecies. 



I. Scales in 17 or 19 rows ; internasals much shorter than the prsefrontals, 



A. Scales in 17 rows; ventrals 187 ; subcauclals 67 pairs... S. giientheri. 



B. Scales in 17 rows ; ventrals 228-276. 



Posterior chin-shields a little shorter than the anterior and in 

 contact with each other ; ventrals 229-24i8 ; subcaudals 

 103-125, all or greater part in pairs 8. granuliceps. 



Posterior chin-shields longer than the anterior and in contact 

 with each other ; ventrals 228 ; subcaudals 110, greater 

 part in pairs S. inornatus. 



Posterior chin-shields shorter than the anterior and separated 

 by scales; ventrals 255-276; subcaudals 93-116, all or 

 greater part single S. gaimardii. 



C. Scales in 19 rows ; ventrals 243 ; subcaudals 126, single. 8. maculatus. 



II. Scales in 21 to 25 rows. 



A. Internasals much shorter than the pi'sfrontals ; scales 



in 21 rows ; ventrals 173 ; subcaudals 157 pairs 8. longicauda. 



B. Internasals nearly as long as, or a little longer than the praefrontals. 



1. Loreal separated from the eye hy the praeocvilar ; subcaudals 152-159, 



single. 



Posterior chin-shields largo and in contact with each other ; 



scales in 21 or 23 rows ; ventrals 225-236 8. aretifasciatus. 



Posterior chin-shields verj' small or absent ; scales in 23 or 25 



rows; ventrals 251-265 8. variabilis. 



2. Loreal entering the eye ; scales in 23 rows ; ventrals 



226; subcaudals 106 pairs 8. befsileanus. 



1. Stenophis guentheri Bouleng. t. c. p. 40, pi. iv. fig. 1. 

 Madagascar. 



2. Stenophis granuliceps. 



Dipsas {^Heterurus) gahnarcli, var. granuliceps Boettg. Abh. 

 Senck. Ges. xi. 1877, p. 14, pi. i. fig, 3. 

 Stenophis granuliceps Bouleng. t. c. p. 41, 

 Madagascar. 



3. Stenophis inornatus Bouleng, t. c. p. 42. 

 Madagascar, 



4. Stenophis gaimardii. 



Dipsas gaimardii Schleg, Phys. Serp. ii. p. 293. 

 Stenophis gaimardii Bouleng. t. c, p. 42. 

 Madagascar ; Comoro Islands. 



5. Stenophis maculatus, 



Dipsadohoa maculata Giinth, Cat. Col. Sn. p. 183. 

 Stenophis maculatus Bouleng, t, c. p. 43, pi. iv, fig. 2. 

 Madagascar (?). 



