from the Congo Free State. 279 



than the parietals, its antero-lateral angles reaching the eyes ; 

 loreal longer than deep; a very small pr^eocular; prefrontal 

 entering the eye; one postocular ; temporals 1 + 2 ; six upper 

 labials, third and fourth entering the eye ; only one pair of 

 well-developed chin-shields. Scales smooth, in 15 rows. 

 Ventrals 107; anal entire; subcaudals ISJ. Blackish brown 

 above and beneath, the ventrals and subcaudals edged with 

 pale brown. 



Total length 310 millim. ; tail 2^. 



A single female specimen from Zongo, Ubangl Rapids. 



This species, which I have the pleasure of naming in 

 honour of Prof. Barboza du Bocage, to whom we are in- 

 debted for much of our knowledge of the reptiles of West 

 Africa, is closely allied to P. amhigua, from which it differs 

 in the more prominent, slightly turned up snout, the minute 

 preeocular, wliich allows the pr^efrontal to border the eye, 

 and the single postocular. 



27. Scaphiophis alhopunctatuSj Ptrs. — Kuanga ; Kassai. 

 Two young specimens. 25 or 27 scales across the neck, 



21 across the middle of the body; ventrals 202, 198; 

 subcaudals 55, 51. 



28. Grayia Smythii, Leach. — Aruwimi. 



29. Basgpeltis scabra, Li. — Zambi ; Kassai; Zongo. 



Sc. 21-23 ; V. 199-232 ; C. 65-81. Some .specimens are 

 uniform pale brown ; others have the dark markings more or 

 less distinct, but always small. 



30. Leptodira Jiitamhoeia, Laur. — Zambi ; Bongo-Congo ; 



Boma ; Kuango; Lomami ; Zongo. 



31. Dromophis Uneatus, D. & B. — Chuapa. 

 First record south of the Equator. 



32. Psammophi's sibilans, L. — Zambi ; Boma. 



33. Thelotornis Kirtlandii, Hallow. — Kassai. 



34. Xenocalamus Mechovii, Ptrs. — Kuango. 



The specimen measures 520 millim. ; tail 55. Two minute 

 postoculars. V. 227 ; C. 34. 



35. Aparallactus ubangensis^ sp. n. 



Diameter of eye greater than its distance from the oral 

 border. Rostral broader than deep, just visible from above; 

 internasals shorter than the prefrontals ; frontal a little longer 

 than broad, longer than its distance from the end of the 

 snout, shorter than the parietals; nasal divided, in contact 



