REPTILES AND BATRACHIANS FROM PENINSULAR SIAM. 155 



the shoulders, nnd a triangular patch on either side of the head, 

 enclosing the eye. Upper surface of the head in most of them, light 

 greeniaii-j'ellow, with, or without dark cross-bars. Usually some 

 light green or grey patches on the flanks. Some with a strong tinge 

 of red upon the back. Belly in some, spotted with black. Tail alter- 

 nately barred with light and dark. 



The nuchal crest in one, is continuous with the dorsal. Some 

 of the specimens, both from Nakon Sitamarat and from Pntiyu, have 

 a slight but distinct gular sac. 



25. Calotks cri.statellu.s (Kulil). 



Bangnara, Patani, and Klong Bang Lai, Patiyu, 3 specimens. 



I have obtained this lizard along the Western boundary of Siam 

 as far north as Lat. 14° 50', but it is evidently rare in the northern 

 part of the Peninsula. 



2ij. Caldtes VEKf>icoL(.)H (Daiul.). 



Bangnara, Patani, and Klong Wang Hip, Nakon Sitamarat. 



27. CaHITES EMMA (iniv. 

 Patani and Nakon Sitamarat. 



28. LlOEEPIS BELEIAXA ((iruv), 



Bangnaro, Patani. 



Vakaxid.e. 



29. Vahaxu.s xebl'eosl's (Gray). 

 Patani, Nakon Sitamarat and Patiyu. 



30. Varaxus .saevatiir (Laiir.). 

 Patani and Nakon Sitamarat. 



Lacektid.i-:. 



31. Tachyduomus sexuxeatcs Daiul. 



Maprit and Klong Bang Lai, Patiyu, Klong Wang Hip, Nakon 

 Sitamarat, and Bangnara, Patani. 



The sexes in adult life can be easily distinguished, the male 

 being more strongly coloured than tlie female. The light dorso-lateral 

 band, with its black edging, is inconspicuous or almost absent in the 

 female, and the general colour is distinctly paler. Young ones resem- 

 ble the female in colouration. 



VOL. II, DEC. line. 



