1855.] Proceedings of the Asiatic Society. 715 



mon C. versicolor of Bengal demonstrates (as its name implies) the 

 merely transient character of these variations. 



Tachydromtjs sexlineattjs, Daudin. This remarkable Lizard, with 

 tail more than twice as long as the head and body, has previously been 

 met with in China, Cochin-china, Java, and Borneo. A specimen pro- 

 cured in Mergui by Mr. Theobald minutely accords with the description 

 by M. M. Dumeril and Bibron in every detail of structure ; but the colour- 

 ing would seem to be unusually dull. We have no doubt respecting the 

 correctness of the identification. Length of specimen 9^ in., of which 

 tail 7 in. 



Tiliqua macularia (Muprepes macularius, nobis, J. A. 8. XXIL, 

 652). This species was procured both by Capt. Berdmore and Mr. Theo- 

 bald ; and the habitat formerly given with a note of doubt is probably 

 erroneous. With five specimens before us, we do not hesitate to place it 

 in the genus Tiliqua, Gray : where it may be readily distinguished from 

 the common T. rufescens, by having the first lateral post-nasal plate 

 scarcely a quarter the size of the second ; whereas in T. rufescens the same 

 plate is more than half the size of the other referred to. The coloration 

 of the two species is also conspicuously different.* 



Dipsas ferruginea, Cantor, (vide J. A. S. XXIII, 293). The range 

 of this species extends from Sikim and Asam to Pegu and Mergui. Its 

 considerable variation of colouring demands notice, and would seem to 

 depend on age. This tree-Snake does not appear to grow beyond 19 or 

 20 in. long, and then increases only in bulk or thickness. A fine adult 

 procured in Mergui by Mr. Theobald is chiefly blackish above, with a 

 series of large pale (but not strongly contrasting) spots along the spine, 

 more or less double and alternating, but the first three or four from the 

 head are single and mesial : lower-parts pale yellow, with a mesial line of 

 irregular black specks, gradually increasing in number and more con- 

 fluent posteriorly, until, about the middle of the body, the black predo- 

 minates over the yellow, and finally leaves but a few yellow specks sprinkled 

 Upon the black ; throat and sides of face also black, continued over several 

 of the series of abdominal scutse : head marked as usual, with a pale line pro- 

 ceeding backward from each nostril, the two joining posteriorly to the eye 



* Here it may be remarked that a small Monitor procured by Mr. Theobald in 

 the Punjab Salt Range, appears perfectly identical with the Psammosaurus 

 Scincus, (Merrem), common in N. E. Africa. We have before remarked this 

 species from Upper Hindustan. A Tortrix or Eryx, also, from the Salt Range, 

 seems to be different from the common species or variety of Upper India, E. indica 

 of Gray. 



