CROCODILIAN^, LIZARDS, AND SNAKES. 



281 



tiiict tliiiii ill the latter. Oii the sides of the neck aud body and on the 

 superior aspect of the tail the black is broken up into small spots. 



In the young the discoid areas are not well outlined, and the central 

 spots are not distinct and are blackish. The ground-color tends to run 

 more into irregular longitudinal lines. The paler color appears rather 

 as the ground, aud it is pea-green • rather than the brownish yellow of 

 the adult. 



On the posterior faces of both femur and tibia, proximad, there is a 

 patch of enlarged keeled scales, with the keels and their mucronate 

 apices directed upu-ard. On the lower anterior border of the humerus 

 a row of enlarged scales presents produced apices, which are recurved, 

 forming a serrate line, most prominent near the elbow. 



The tail is very wide and is much depressed for some distance from 

 the base, and only the terminal i)art is cylindric. Along the widened 

 portion the lateral scales are imbricate, and have recurved apices, 

 giving a rough appearance. The median superior scales are like the 

 dorsals, smooth, not imbricate, and rounded. 



Measurements. — Total length, 188 mm. 5 length to vent, 92 mm. ; length 

 to axilla (axial), 40 mm.; length to auricular meatus (axial), 17 mm.; 

 width at auricular meatus, 17 mm. ; width of base of tail, 18 ram. ; length 

 ,of fore limb. 45 mm.; length of fore foot, Ifi mm.; length of hind limb, 

 73 nun.; length of hind foot, 31 mm. 



Uma rufopunciata Cope. 



UMA INORNATA Cope. 

 Uma inornata Copr, American Naturalist, XXIX, 1895, p. 939. 



Specimen Cat. No. 10500 represents perhaps a fourth species, which 

 agrees in most respects with the U. ritfopunctata, but differs in the num- 

 ber of femoral pores and in coloration; is immature and about the size 

 of the one which served as the type of the U. notata of Uaird. It was 

 caught on the Colorado Desert of San Diego County, California, at a 

 distance of from 100 to 140 miles south of the Mohave Desert of Ari- 

 zona where the type of the U. notata was taken. 



In the character of its coloration it resembles the U. notata and the 

 young of the U. rufopunctata, except in the absence of the conspicuous 

 black spot on each side of the belly, which is present in every individual 

 of this genus hitherto discovered. \n its squaiuation it resembles 

 rather the TJ. rnfopunctata than the U. notata, aud like it, unlike the 



