212 Journal of the Asiatic Society of Bengal, August, 1905 
Localities— teem 
Monghyr, Bengal, and Rampore Tea Estate, N. Cachar. Two. 
specimens, both purchased. 
H. indicus may be distinguished from H. schéstosus, the only 
other Asiatic. species, by its viper-like head, small eye and smooth 
1, Diameter of the eye more than half the length of the frontal. 
Scales keeled, in 19 rows feet ee schistosus. 
2.\Diameter of the eye not more than half the length of the 
frontal 
Seales smooth, in 21 rows; nasals in contact behind the 
rostral a , an ~ . indicus. 
The distribution of the genus Helicops is very interesting 
Species occur in i nd i 
was founc . is fact, seemingly trivial in itself, illustrates the 
improbability of convergence or parallel development being the 
explanation of all such difficulties in the study of the distribution 
Fig. 2. 
Helicops indicus. 
of animals ; for both Helicops and Herpele are well defined and ap- 
parently natural genera, having no peculiarity in common with 
one another superficially or anatomically. 
Dipsapoipes, gen, nov. 
Family Colubride ; sub-family Dipsad i 
Co 5: y Dipsadomorphine. 
Head distinct from body ; eye large, with circular pupil; body 
seca eg eae 
1 Ann. Mag. N. H. (xix), 1904, p. 267. 
