Datrachians and Reptiles. 399 



hind limb reaches the ear, or between the shoulder and the 

 ear j digits longer than in the preceding species, the claws 

 more slender ; hinder side of thighs uniformly granular. 

 Male with 6 to 8 anal pores. Tail once and a half to once 

 and three fourths as long as head and body ; upper caudal 

 scales larger than dorsals, keeled and usually slightly mucro- 

 nate. Greyish or brownish above, sometimes tinged with 

 orange, usually with blackish and yellow spots, the larger 

 blackish spots in form of more or less regular bars disposed 

 in longitudinal and transverse series ; a more or less distinct 

 white band between two black lines on the hinder side of the 

 thiglis; lower parts white, throat usually spotted or marbled 

 with blackish. 



milliin. 



Total length (of male) 170 



Plead 17 



Width of head 13 



Body 48 



Fore limb 25 



Hind limb 42 



Tail 105 



Numerous specimens from Bolivia, collected by P. 0. 

 Simons at Potosi, 4200 m., Cliallapata, 3700 m., and Uyuni, 

 3660 m. 



Tropidurus melanopleurus. 



Upper head-scales smooth ; a series of five or six trans- 

 versely enlarged supraoculars, not quite half as broad as the 

 supraocular region ; occipital broader than long, a little 

 broader than the supraocular region ; anterior border of ear 

 scarcely denticulated; temples granulate. A strong curved 

 antehumeral fold, narrowly separated from its fellow on the 

 throat ; latter distinctly folded, as well as the sides of the 

 neck, which are minutely granulate. Body much depressed ; 

 a mere indication of a very slight nuchal crest, not continued 

 on the body; dorsal scales small, rliomboidal, juxtaposed, 

 faintly keeled ; lateral scales much smaller still ; ventral 

 scales as large as dorsals, subimbricate, smooth. The ad- 

 pressed hind limb reaches the eye. Tail nearly twice as 

 long as head and body, rounded, without crest, the scales 

 larger than those on the body. Dark olive above, sides of 

 head and body black ; a broad yellowish band on each side, 

 irom behind the eye to above the groin; throat and ante- 

 humeral fold black ; belly white. 



