SNAKES OF MADAGASCAR. 375 



Seven species 



I. Scales in 25 rows ; loreal twice as long as deep ; frontal 



nearly as broad as long P. microps. 



II. Scales in 21 rows. 



8 upper labials, 4tli and 5tli entering ej'e ; rostral just visible 



hova above P. lieterxirus. 



8 upper labials, 4th and 5th entering e3'e ; portion of rostr.il 

 visible from above at least half as long as its distance 

 from the frontal P. quinquelineatus. 



7 upper labials, 3rd and 4th entering e^^e P. ambreetisis. 



III. Scales in 19 rows P. imermce. 



IV. Scales in 17 rows. 



Rostral broader than deep; ventrals 183; subcaudals 64 P. occipitalis. 



llostral deeper than broad; ventrals 167; subcaudals 37 P. stibcaudaUs. 



1. PsEUDOXYRtioPUS MICROPS GUntb. Ann. &, Mag. N. H. (5) 

 vii. 1881, p. 359, fig. ; Bouleng. t. c. p. 315, &, iii. p. 613. 



Pseudoxijrhopus duhius Mocquarcl, Bull. Mus. Paris, 1904, 

 no. 6, p. 305. 

 Madagascar. 



2. PSEUDOXYRHOPUS HETERUHUS. 



Ilomalocephalus heterurus Jan, Arch. Zool. Anat. Phys. ii. 

 1863, p. 286. 



Pseudoxijrhojnds heterurus Bonleng. Cat. Sn. i. p. 315. 

 Madagascar. 



3. PSEUDOXYRHOPUS QUINQUELIXEATUS. 



Liophis quinquelineatus Giintli. Ann. & Mag. N. H. (5) vii. 

 1881, p. 359, fig. 



P seudoxyrhopus qihinqiielineatus Bouleng. t. c. p. 315. 

 Madagascar. 



4. PsEUDOXYRHOPUS AMBREENSis Mocquard, CR. Soc. Philom. 

 1894, no. 9, p. 4 ; Bouleng. Cat. Sn. iii. p. 613. 



Madagascar. 



5. PsEUDOXYRHOPUS IMERIN^. 



Liophis imerince Giinth. Ann. & Mag. N. H. (6) v. 1890, p. 71. 

 Pseudoxyrhojjus imerince Bouleng. Cat. Sn. i. p. 316. 

 Madagascar. 



6. PsEUDOXYRHOPUS OCCIPITALIS Bouleng. Cat. Sn. iii. p. 613. 

 Madagascar. 



7. PsEUDOXYRHOPUS SUBCAUDALIS. 



Rhahdotophis sicbcaitdalis Werner, Jahresh. Nat. Ver. Wiirt- 

 temb. Ixv. 1909, p. 58. 

 Mada.";ascar. 



