316 COLTJBEID^. 



Snout prominent, subouneiform. Eostral broader than deep, the 

 portion visible from above at least half as long as its distance from 

 the frontal ; internasals shorter than the prsefrontals ; frontal a 

 little longer than broad, as long as its distance from the end of the 

 snout, a little shorter than the parietals ; loreal longer than deep ; 

 one prae- and two postoculars ; temporals 1+2, the anterior in 

 contact with the lower postooular only ; eight upper labials, fourth 

 and fifth entering the eye ; four lower labials in contact with the 

 anterior chin-shields, which are as long as the posterior. Scales 

 in 21 rows. Ventrals 142 ; anal divided ; suboaudals 45-47. 

 Brown above ; a broad margin round the upper jaw yellowish, 

 both colours being divided by a sharply-defined line ; live blackish 

 lines along the body ; a few brown spots on the labials ; lower 

 parts uniform yellowish. 



Total length 490 millim. ; tail 85. 



Madagascar. 



a-b. d (V. 142 ; C. 47) & J Betsileo. Mr. T. Waters [C,"]. 



(V. 142; 0.45). (Types.) 



4. Pseudoxyrhopus imerinae. 



Coronella microps, Bouleng. Ann. Sf Mag. N. H (6) i. 1888, p. 104, 



pi. V. fig. 4. 

 Liophis imerinas, Gunth. Ann. 8( Mag. N. H. (6) v. 1890, p. 71. 

 Pseudoxyrhopus imerinse, Buulenq. Ann. ^ May. N. H. (&) vi. 1890, 



p. 313, fig. 



Rostral broader than deep, the portion visible from above about 

 half as long as its distance from the frontal ; suture between the 

 internasals a little shorter than that between the prsefrontals ; 

 frontal about once and a half as long as broad, longer than its dis- 

 tance from the end of the snout, shorter than the parietals ; loreal a 

 little longer than deep ; one prte- and two (rarely three) post- 

 oculars ; temporals l-|-2, the anterior in contact with the lower 

 postocular only, rarely 2-|-3; eight upper labials, fourth and fifth, 

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

 in contact with the anterior chin-shields, which are as long as the 

 posterior. Scales in 19 rows. Ventrals 137-148 ; anal divided ; 

 subcaudals 40-47. Young pale brown above, with six or eight 

 dark brown longitudinal lines, the median pair bordering a band 

 of darker brown than the ground-colour ; upper surface of head 

 with dark brown variegations ; a dark brown streak on each side 

 of the head, passing through the eye, bordered below by a white 

 streak ; upper lip dark brown ; throat brown, with white markings ; 

 belly pale brown, each shield with a darker anterior margin. 

 Adult with the dorsal markings more or less distinct, and the belly 

 nearly black. 



Total length 460 millim. 



Madagascar. 



