SXAKES OF MADAGASCAR. 379 



3. Langaha. 



Bruguiere, Journ. de Phys. xxiv. 1784, p. 132 ; Bouleng. Cat. 

 Sn. iii. p. 35. 



Synopsis of the Species. 



I. A single supraocular ; rostral appendage pointed. 



Rostral appendage at least twice as long as snout, ensiform, not 



serrated i. nasuta. 



Rostral appendage once and a half to once and two-thirds as long 

 as snout, tapering to a sharp point, and serrated above at the 

 end L. intermedia. 



Rostral appendage not more than once and a half as long as snout, 



serrated above and beneath i. crista-galli. 



II. Three supraoculars, in addition to an erect horn-like scale 



above the eye ; rostral appendage not much longer than 



snout, very obtuse, grooved beneath L. allnandi. 



1. LAN GAHA NASUTA Shaw, JSTat, Misc. xxii. pi. cmlxviii. ; 

 Bouleng. t. c. p. 36. 



Madagascar. 



2. Langaha intermedia Bouleng. Ann. k Mag. N". H. (6) i. 

 1888, p. 105, pi. V. fig. 6 ; and t. c. p. 37. 



Madagascar. 



3. Langaha crista-galli Dum. & Bibr. Erp. Gen. vii. p. 806, 

 pi. Ixxi. ; Bouleng. 1. c. 



Madagascar. 



4. Langaha alluaudi Mocquard, Bull. Mus. Paris. 1901, 

 p. 253. 



Madagascar. 



4. Alluaudina. 



Mocquard, CR. Soc. Philom. 1894, no. 17, p. 9 ; Bouleng. Cat. 

 Sn. iii. p. 38. 



1. Alluaudina bellyi Mocquard, 1. c. ; Bouleng. 1, c. 

 Madagasca]\ 



5. Etbirodipsas. 

 Jan, Elenco sist. Ofid. p. 105 ; Bouleng. Cat, Sn. iii. p. 38. 



1. Eteirodipsas colubrina. 



Dipsas colubrina Schleg. Phys. Serp. ii. p. 273, 

 Eteirodipsas colubrina Bouleng. t. c. p. 39. 

 Madagascar. 



Proc. Zool. Soc— 1915, No. XXYII. 27 



