REPTILIA. 267 



don DuM., BiBR., GUERIN Iconogr., Rept. PI. 21, fig. 2; this species from 

 the Sunda Islands attains a considerable size (7' or 8'); there is an oblique 

 black stripe behind the eye. 



Dryophis Dalman, Boie, Dryinus Mere. Head narrowed, 

 triangular, elongate, excavated at the sides in front of eyes, flat 

 above. Upper jaw protracted beyond lower. Scales narrow, 

 lanceolate. Body slender ; tail often longer than half the trunk, 

 thin, acuminate. 



a) With scales carinatc. Dryophis Wagl. {Xiphorhynchus Wagl., 



DUM., BiBR.) 



Sp. Dryophis fulgidus Wagl., Coluber mycterizans L, (in part), Dry(yphis 

 Catesbyi Schleg. Ahh. Tab. 36; in the southern part of North America 

 and in Surinam; — Dryophis Langaha ScnijEa. (Xiphorhiiia'FiTZ.), Langaha 

 Madagascar iensis, Brug. Journal de Physique, 1781, Fevrier, Lacep. 

 Quadrup. ov. et Serp. 11. PI. 22, fig. i, Schleg. Alh. Tab. 7, figs. 7 — 11 ; 

 Madagascar ; this species is grey-brown, and has at the head forwards a 

 long, pointed and scaly appendage. 



b) With scales smooth. Tragops Wagl., Dum., Bibr. (and Dryinus 

 DuM., Bibr., Oxyhelis Wagl., Dum., Bibr.) 



Sp. Dryophis nasutus Boie, Lacep. ii. PI. 4, fig. 2, Russell Serp. 1. PL 12, 

 GuERiN Iconogr., Rept. PI. 22, fig. 2 ; found on the continent of India, 

 as also in the Indian Archipelago ; this species is bright green, with a yellow 

 stripe on each side along the belly. The pupil is a transverse fissure, as in 

 Dryophis prasinus Reinw., Schleg. Ahh. Tab. viii. figs, i — 6, a very com- 

 mon species in the same countries. All these snakes live on trees. 



PsammojjjMs BoiE, FiTZ. Head narrow, towards the apex 

 rotundato-acuminate. Anterior lower teeth longer. Eyes large, 

 covered by the exsert margin of superciliary scute ; pupil round. 

 Body elongate, with scales lanceolate or elongato-hexangular, 

 mostly smooth. Tail longer than half the trunk, covered below 

 with scutes in pairs. 



a) With middle teeth in iqtper jaw longer. 



Sp. Psammophis sibilans nob., Coluber sibilans L., Coluber moniliger Lacep. 

 Qitadr. ovip. et Serp. Ii. PI. 12, fig. i ; in almost the whole of Afi-ica, in 

 Egypt, on the coast of Guinea, and even as far as the Cape of Good Hope, 

 from whence it was described and figured by Merrem, Beitr. i. Taf. 3, 

 under the name of Coluber crucifer; Dumeril and BiBRON, however, 

 believe this to be a distinct species. 



b) With teeth in upper jaw equal, except the last, tvhicJi is grooved. (Coelo- 

 peUis Wagl., Dum. and Bibr.) 



