4 Lacertidse. 



lY. Ventral plates smooth; collar absent or feebly 

 marked; subdigital lainellse keeled, except in 

 Tropidosaura and some species of Psammo- 

 dromus ; dorsal scales large or rather large, 

 rhombic or lanceolate, strongly keeled. 



A. Lower eyelid opaque, with numerous scales in 



the middle. 



Nostril pierced between two or three nasals ; digits 

 with smooth or tubercular lamellae inferiorly. 



13. Tropidosaura, Pitz. 



Nostril pierced between two nasals and the first 

 upper labial or separated from the latter by a 

 narrow rim ; digits with smooth, tubercular or keeled 

 lamellae inferiorly .... 14. Psammodromus, Fitz. 



Nostril pierced between two or three nasals ; digits 

 with keeled lamellse inferiorly . . 15. Ichnotropis, Peters. 



B, Lower eyelid with a very large transparent disc. 



Lower eyelid distinct from the upper . 16. Cabrita, Qtvaij. 



Lower eyelid fused with the upper . 17. Ophiops, Menetr. 



Y. Ventral plates smooth ; collar present or absent ; 

 subdigital lamellse keeled, or digits fringed 

 laterally; dorsal scales small; nostril well sepa- 

 rated from the first upper labial. 



Digits not distinctly serrated laterally ; collar more or 



less distinct ; femoral pores . . .18. Eremias, Wiegm. 



Digits serrated or fringed laterally ; collar distinct ; 



femoral pores 19. Scaptira, Wiegm. 



Digits fringed laterally ; collar distinct ; no femoral 



pores 20. Macmahonia, Blgr. 



Digits fringed laterally ; no collar ; no femoral pores. 



21. Aporosaura, Blgr. 



"YI. No frontoparietals; two series of large smooth 

 plate-like scales along the back and tail; digits 

 serrated laterally; tail much depressed, fringed 

 laterally ... 22. Holagpis, Gray. 



