LIST OF SOUTH AFRICAN SNAKES. 451 



10. PROSYMNA. 



Gray, Cat. Sn. p. 80 ; Bouleng. Cat. Sn. ii. p. 246. 



Five Species in South Africa. 



I. Scales smooth, in 15 rows. 



A. Internasal paired ; two superposed anterior 



temporals . . . . . . . . . . . . P. sundevallii. 



B. Internasal single ; a single anterior temporal. 

 Width of the frontal not half the width of the head ; 



ventrals 167 ; subcaudals 50 . . . . . . . . P. frontalis. 



Width of the frontal more than half the width of the 



head; ventrals 131-153 ; subcaudals 19-34 •• P- ambigua. 



Width of the frontal more than half the width of the 



head ; ventrals 169-185 ; subcaudals 38-49 . . P. bergeri. 



II. Scales keeled, in 17 rows ; a single internasal . . P. jani. 



1. Prosymna sundevallii. 



Temnorhynchus sundevallii, Smith, 111., Rept., App. p. 17. 



Prosymna sundevallii, Bouleng., t.c, p. 247. 



Cape Colony, Natal Orange Free State, Transvaal. 



Cape Colony : Burghersdorp (Kannemeyer) ; ClanwilUam (Slabber) ; 

 Hanover (Schreiner) ; Graaff-Reinet (Paynter) ; Tulbagh (Light- 

 foot) ; Little Namaqualand. 



2. Prosymna frontalis. 



Temnorhynchus frontalis, Peters, Mon. Berl. Ac, 1867, p. 236, pi. — , 



fig- I. 

 Prosymna frontalis , Bouleng., t.c, p. 248. 

 South-West Africa, Angola. 



3. Prosymna ambigua, Bocage, Jorn. Sc. Lisb. iv., 1873, p. 218 ; Bouleng., 



t.c, p. 248. 

 Southern Rhodesia, Zululand, East Africa, Angola. 



4. Prosymna bergeri, Lindholm, Jahrb. Nassau. Ver. Iv., 1902, p. 57. 

 South- West Africa. 



5. Prosymna jani, Bianconi, Mem. Ace. Bologna (2) i. 1862, p. 470, pi. i. ; 



Bouleng., t.c, p. 249. 

 Portuguese East Africa, Zululand. 



II. HOMALOSOMA. 



Wagler, Syst. Amph. p. 190 ; Bouleng. Cat. Sn. ii. p. 273. 



Two Species in South Africa. 



Ventral 1 15-144 .. .. .. .. .. .. H. tutrix. 



Ventrals 97-110 .. .. .. .. .. .. H. variegatum. 



I. Homalosoma lutrix. 



Coluber lutrix, Linn. S. N. i. p. 375. 



Homalosoma lutrix, Bouleng., t.c, p. 274. 



Homalosoma shiranum, Bouleng., t.c, p. 276. 



South Africa, Central and East Africa. 



Cape Colony : Cape Town (Oakley) ; East London (Wood) ; Caledon 



(Burgess) ; Port St. Johns (Shortridgc) ; Knysna (Groom) ; 



IBurghersdorp (Kannemeyer) ; Middelburg (Piers) ; Paarl (Purcell) ; 



Port Elizabeth (Moorhouse) ; Little Namaqualand (Peringuey). 

 Transvaal: Barberton (Rendall). 



