1. TacHYDROMUS. 3 
B. Nostril well separated from the labials. 
1. Lower eyelid scaly or with a small transparent disk. 
a. Digits smooth or indistinctly keeled inferiorly, not fringed 
laterally. 
Collar well marked; ventral plates keeled. 
3. Gastropholis, p. 7. 
Collar absent ; dorsal scales large, imbricate, strongly keeled. 
7. Tropidosaura, p. 50. 
Collar well marked ; dorsal scales small; ventral plates smooth. 
8. Nucras, p. 52. 
6. Digits distinctly keeled inferiorly, not fringed laterally. 
Collar absent ; dorsal scales large, imbricate, strongly keeled. 
13. Ichnotropis, p. 78. 
Collar more or less distinct; dorsal scales small. 
14, Eremias, p. 80. 
c. Digits fringed laterally. 
Femoral pores .....0 cece eee eee 15 Scapteira, p. 107. 
No femoral pores ............005. 16. Aporosaura, p. 117. 
2, Lower eyelid with a very large transparent disk covering 
nearly entirely the eye; digits strongly keeled infe- 
riorly. 
Lower eyelid movable ............ 11. Cabrita, p. 69. 
Lower eyelid united with the upper.. 12. Ophiops, p. 72. 
II. No frontoparietals; tail much depressed and denticulated late- 
PAY cay aecs ee nedy arene ours 17. Holaspis, p. 118. 
1. TACHYDROMUS. 
Tachydromus, Daud. Rept. iii. p. 251; Wagler, Syst. Amph. p. 157; 
Weegm. Herp. Mex. p.10; Dum. & Bibr.v. p. 155; Gray, Cat. 
LInz, p. 52; Giiinth. Rept. Brit. Ind. p. 69; Lataste, Ann. Mus. 
Genov. (2) ii. 1885, p. 125. 
Tachysaurus, Gray, J. ¢. 
Head-shields normal *. Nostril pierced between two nasals and 
the first labial. Lower eyelid scaly. Collar more or less distinct. 
Back covered with large, rhomboidal, keeled shields forming longi- 
* I. e. a frontonasal, a pair of preefrontals, a frontal, a pair of frontoparietals, - 
a pair of parietals, an interparietal, and an occipital. ‘ 
B 
