124. HTPSIKHINA. 7 



Homalopsis olivaceus, Cantor, Froo. Zool. Soc. 1839, p. 55. 

 Hypsirhina trilineata, Grai/, Zool. Misc. p. 66 (1842). 



bilineata, Gray, I. c, and Cat. p. 73. 



furcata, Gray, II. cc. 



aer, Gray, Cat. p. 72. 



Homalopsis enhydris, Cantor, Cat. Mai. JRept. p. 99 (1847). 

 Hypsirhina enhydris, Dujn. ^ Bibr. vii. p. 946 (1854) ; Gunth. Bept. 



Urit. Ind. p. 281, pi. xxii. fig. K (1864) ; Jan, Arch. Zool. Anat. 



Phys. iii. 1865, p. 261, and Icon. Gin. 80, pi. iii. fig. 2, & t. fig. 1 



(1868) ; Theob. Cat. Bept. Brit. Ind. p. 183 (1876) ; Boulmg. Faun. 



Ind., Bept. p. 376 (1890). 



Rostral twice as broad as deep_; internasal single, nearly twice 

 as broad as long ; frontal nearly twice as long as broad, as long as 

 or shorter than its distance from the end of the snout, as long as 

 the parietals ; loreal as long aa deep or a little longer than deep, in 

 contact with the internasal ; one prse- and two (rarely one) post- 

 oculars; temporals 1 + 2 ; eight upper labials, fourth entering the 

 eye ; four lower labials in contact with the anterior chin-shields, 

 which are shorter than the posterior ; latter widely separated from 

 each other. Scales in 21 rows, rarely 23 (specs, a, c). Ventrals 

 150-177 ; anal divided ; subcaudals 47-78. Dark grey, brown, or 

 olive above, with two more or less distinct light longitudinal bands ; 

 lower parts whitish, with a blackish line along each side of the 

 ventrals, and usually a median blackish line or series of dots. 



Total length 680 miHim. ; tail 135. 



Bengal, Southern India, Ceylon, Burma, Southern China, Cochin- 

 china, Siam, Malay Peninsula and Archipelago. 



A. A dark median ventral line. (S. enhydris, Schn. ; H. tri- 



lineata, Gray.) 



a. ? (V. 155; C.P). 



b, e. d (V. 157, 157 ; 0. 

 67, 64). 



d-e. Yg. (V. 162, 158; 



C. 66, 67). 

 /. 2 (V. 163 ; 0. 60). 

 ff. ? (V.169;C.71). 

 k-r. Yg. (Y. 170, 168, 



172, 170, 177, 166, 168, 



166, 171, 164 ; 0. 78, 



75, 74, 74, 72, 63, 62, 



64, 63, 64.) 

 s-t. tJ (V. 158 ; 0. 64) & 



5 (V. 157 ; 0. 58). 

 u. Hgr. $ (V. 163; 0. 



69). 

 V. ? (V. 169; C. 63). 



B. Median ventral line absent or reduced to a few widely sepa- 



rated dots. {S. bilineata. Gray ; M. furcata, Gray.) 



a. S (V. 161 ; 0. 63). China. W. Lindsay, Esq. [P.]. 



(Type of S. bilineata.) 



