206 MR. G. A. BOULENGER ON 



13. PlIILOTHAMNUS. 



A. Smith, 111. Zool. S. Afr., Kept. ; Bouleng. Cat. Sn. ii. p. 98. 

 Two species : — 



At least 3 temporals (1 + 2), usually more (2 + 2 or 2 + 2 + 2) ; 



green above, with or without black spots or bars P.semivariegatus. 



3 temporalis (1 + 1 + 1, rarely 1 + 2) ; a dark vertebral stripe; 



snout yellowish or reddish brown P. dorsalis. 



1. Philothamntts semivariegatus A. Smith, op. cit. pis. lix., 

 lx. & lxiv. fig. 1 ; Bouleng. t. c. p. 99 ; Bocage, Herp. Ang. p. 90, 

 pi. xiii. fig. 2.* 



Tropical and South Africa. 



2. Philothamnus dorsalis. 



Leptophis dorsalis Bocage, Jorn. Sc. Lisb. i. 1866, p. 69. 

 Philothamnus dorsalis Bouleng. t. c. p. 101 ; Bocage, Herp. 

 Ang. p. 92, pi. xiii. fig. 3. 

 Gaboon, Congo, Angola. 



14. Gastropyxis. 



Cope, Proc. Ac. Philad. 1860, p. 556; Bouleng. Cat. Sn. ii. 

 p. 102. 



1. Gastropyxis smaragdina. 



Dendrophis smaragdina Schleg. Phys. Serp. ii. p. 237. 

 Gastropyxis smaragdina Bouleng. t. c. p. 103. 

 Hapsidophrys smaragdina Bocage, Herp. Ang. p. 96. 

 Tropical Africa, from Sierra Leone and Uganda to the Congo 

 and Northern Angola. 



15. Hapsidophrys. 



Fischer, Abh. Nat. Ver. Hamb. iii. 1856, p. 110; Bouleng. 

 Cat. Sn. ii. p. 103. 



1. Hapsidophrys lineata .Fisch. I.e. p. Ill, pi. ii. fig. 5; 

 Bouleng. t. c. p. 104; Bocage, Herp. Ang. p. 97. 



West Africa, from the Gold Coast to the Congo, eastwards 

 to Uganda. 



16. Thrasops. 



Hallow. Proc. Ac. Philad. 1857, p. 67 ; Bouleng. Cat. Sn. ii. 

 p. 104. 



1. Thrasops flavigularis. 



Dendrophis flavigularis Hallow. Proc. Ac. Philad. 1852, p. 205. 

 Thrasops flavigularis Bouleng. t. c. p. 105 ; Bocage, Herp. 

 Ang. p. 97. 



West Africa, from Sierra Leone to the Congo. 



* The synonymy of this species should probablj- include Ph. nitidus Gthr. and 

 Ph. lac/oensis Gthr. 



