508 Annals of tlie South African Muscnvi. 



4. Chlorophis irregularis. 



Coluber irregularis, Leach, in Bowdich, Ashantee, p. 494. 

 C'Jilorojjhis irregularis, Bouleng., i.e., p. 96. 

 Tropical Africa, Southern Ehodesia. 



Southern Ehodesia : Mazoe (Darhng) ; Salisbury (Marshall, 

 Thomas). 



9. PHILOTHAMNUS. 



Smith, 111., Eept. ; Bouleng. Cat. Sn. ii. p. 98. 



A single Sjjecies in Sout'li Africa. 



Philothamnus semivariegatus, Smith, op. c, pis. lix. and 1x. ; 

 Bouleng., t.c, p. 99. 



Tropical and South Africa. 



Cape Colony : Douglas (Orpen). 



Transvaal : Barberton (Eendall). 



Ehodesia : Salisbury (Thomas, Darling) ; Livingstone (Stephen- 

 son). 



Portuguese East Africa : Delagoa Bay (De Coster). 



10. PEOSYMNA. 

 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 . . /-•. sundevallii. 



B. Internasal single ; a single anterior temporal. 



Width of the frontal not half the width of the head ; ventrals 167 ; 



subeaudals 50 P. frontalis. 



Width of the frontal more than half the width of the head ; ventrals 



131-153; subeaudals 19-34 P. (imhigua. 



Width of the frontal more than half the width of the head ; ventrals 



169-185 ; subeaudals 38-49 P. herf)eri. 



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



1. Pbosymna sundevallii. 



Temnorhynchus simdevallii, Smith, 111., Eept., App. p. 17. 



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



Cape Colony, Natal, Orange Eiver Colony, Transvaal. 



Cape Colony : Burghersdorp (Kannemeyer) ; Clanwilliam (Slab- 

 ber) ; Hanover (Schreiner) ; Graaff-Eeinet (Paynter) ; Tulbagh 

 (Lightfoot) ; Little Namaqualand. 



2. Prosymna frontalis. 



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

 pi. ~, fig. 1. 



