212 MR. G. A. BOULENGER ON 



Rhagerhis tritceniata Giinth. Ann. & Mag. N. H. (4) i. 1868, 

 p. 423, pi. xix. fig. H ; Bocage, op. cit. p. 110, pi. x. a fig. 1. 



Trimerorhinus tritceniatus Bouleng. t. c. p. 139. 



Africa south of the Equator, East Africa as far north as 

 Abyssinia. 



I now regard T. tritceniatus, with 2 or 3 regular dark bands 

 along the head and body, as a variety of T. rhombeatus. 



7. Rhamphiophis. 



Peters, Mon. Berh Ac. 1854, p. 624 ; Bouleng. Cat. Sn. iii. 

 p. 144. 



Two species : — 



Prseocular in contact with frontal ; subeaudals 53-63 B. actittts. 



Prseocular not in contact with frontal ; snout with angular 



horizontal edge, curved in profile ; subcaudals 90-110 P. oxyyhyncliViS. 



1 . Rhamphiophis ACUTUS,. 



Psammophis acutus Giinth. Ann. & Mag. 1ST. H. (6) i. 1888, 

 p. 327, pi. xix. fig. D. 



Rhagerhis acuta Bocage, Herp. Aug. p. Ill, pi. x. a fig. 2. 



Rhamphiophis acutus Bouleng. t. c. p. 148. 



Angola. 



2. Rhamphiophis oxyrhynchus. 



Psammophis oxyrhynchus Reinh. Yid. Selsk. Shrift, x. 1843, 

 p. 244. 



Rhamphiophis oxyrhynchus Bouleng. t. c. p. 146. 

 Tropical Africa, 



8. Dromophts. 



Peters, Mon. Berh Ac. 1869, p. 447; Bouleng. Cat. Sn. iii. 

 p. 149. 



1 . Dromophis uneatus. 



Dryophi/lax Uneatus Dum. & Bibr. Erp. Gen. vii. p. 1124. 



Dromons Uneatus Bouleng. 1. c. 



Coast of Guinea to Eastern Soudan, Central Africa. 



9. Psammophis. 

 Boie, Isis, 1827, p. 521 ; Bouleng. Cat. Sn. iii. p. 152. 



Synopsis of the Species. 

 I. Scales in 17 rows. 

 A, Frontal, in the middle, much narrower than the supraocular. 



Anal entire ; 8 upper labials, 2 entering the eye P. notostictus. 



Anal divided; 8 (rarely 9) upper labials, 2 entering the eye P. silt Hans. 



Anal divided ; 9 upper labials, 3 entering the eye P. bowgii. 



