MORPHOLOGY OF VENOMOUS SNAKES 5 



Genus DIPSADOMORPHUS Fitzinger. 



Boiga Fitzinger and Stejneger. 



The maxillary bone carries lo to 14 teeth with 2 or 3 elongated, grooved teeth 

 in the rear. Pupil vertical. Body and tail very long. Arboreal. The median or 

 vertebral row of smooth scales is enlarged; ventral scales broad, forming an obtuse 

 lateral angle which facilitates climbing. Subcaudals divided. This genus con- 

 tains 22 species. 

 Dipsadomorphus trigonatus. 



Pale gray or yellowish-olive above, with a white band or spots with black edge 

 along the back. The band is zigzag. Inhabits India and grows to 3 feet in length, 



Dipsadomorphus cyaneus. 



A beautiful arboreal snake, with green above and greenish-yellow underneath; 

 black between the scales and along the dorsal side. Inhabits northern India and 

 Assam, and reaches the length of 4 to 5 feet. 

 Dipsadomorphus kraepelini Stejneger. 



Color in general rather dusky gray, with brownish spots and bands. Inhabits 



Formosa. 



Genus DIPSADOBOA Giinther. 



Maxillary teeth 16 to 18, followed, after a short interspace, by a pair of enlarged 

 grooved fangs situated below the posterior border of the eye. Head distinct from 

 neck; eye rather large, with vertically elliptical pupil. Subcaudals single. Only 

 one species. West Africa. 



Genus RHINOBOTHRYUM Wagler. 

 The only species R. lentiginosum inhabits tropical South America. 



Genus HIMANTODES Dumlril and Bibron. 

 Seven species are known. Tropical South America and Central America. 



Genus CHAM^TORTUS Giinther. 

 The only species, C. aulicus, inhabits east and central Africa. 



Genus GEODIPSAS Giinther. 

 Two species, infralineata and boulengeri, are found in Madagascar. Length 



about 1.5 to 2.2 feet. 



Genus HOLOGERRHUM Giinther. 



Only species, philippinum, has 40 caudals in single row and reaches about a foot. 



Genus ITHYCYPHUS Gunther. 

 Two species, goudoti and mineatus, abound in Madagascar. 2.5 to 3.5 feet long. 



Genus LANGAHA Brugniere. 



Three species, nasuta, intermedia, and crista-galU, inhabit Madagascar. Dry- 

 iophis Schlegel is a synonym of this genus. 



Genus ALLUAUDINA Mocquard. 

 It has only one species, hellyi. Madagascar. 



Genus ETEIRODIPSAS. 

 This is contained in Dipsas Schlegel. The only species, coliihrina, inhabits 



Madagascar. 



Genus STENOPHIS Boulenger. 



Eight species are known. Madagascar. 



Genus LYCODRYAS Giinther. 



The only species, sancti johannis, reaches a length of 2.5 feet. Madagascar. 



