CROCODILIANS, LIZARDS, AND SNAKES. 



583 



flat scales. Iiifralabials 5, with two large scales posteriorly above the 

 last two. Gular scales medially rather large, twice or thrice as large 

 as the laterals, and eciualiiig those of the mesoptychiiiui. The latter 

 are of moderate size, and are in several transverse series, the posterior 

 smaller at the sides, but not granular. Keels of caudal scales in con- 

 tinuous lines; femoral pores 20-:il. 



Old specimens black above and below, except the hind legs, palms, 

 and median line of tail below. The superior face of the hind leg is 

 dark olive, closely variegated with light olive. The posterior face of 

 the femur is yellowish, with three black longitudinal stripes; the infe- 

 rior, which runs along the posterior edge of the femoral pores, is 

 narrow, and sometimes wanting; and the superior pale stripe is some- 

 times imperfect. In younger specimens of adult size seven narrow, 

 regular stripes a little paler than the ground color may be seen, three 

 on each side of a median vertebral one. The interspaces are obscurely 

 pale, spotted. The inferior stripe extends from the groin to the axilla. 

 In such specimens the coloration of other regions is like that of the 

 adult. Accompanying these is a smaller and probably younger speci- 

 men, which nevertheless contains two eggs which have very much the 

 color of the C. sexUneatus. There are seven olive stripes on a black 

 ground, not so bright as on the species named. The under surfaces are 

 white, except the mesoptychium and sides of throat, which are dusky. 

 The limbs are black above, the cubitus with two longitudinal stripes 

 behind, and the thigh with two yellow stripes and a yellow space below 

 posteriorly. Superior face of thigh with two more or less interrupted 

 longitudinal stripes; lower leg with three. No spots in the spaces 

 between dorsal stripes. 



Cnemidophorus tessellatiis atliiops Cope. 



This form resembles most the G. t. melanostethus, but the coloration 

 is different in several respects. The uniform black color of the adults 

 is unknown in the latter, and the striping of the legs, especially of the 

 hind legs in the adult, is equally a peculiarity of the present form. 

 The possession of 6 stripes instead of 4, or 3 on each side of the median 

 line, alters this form to the C. t. perplexus rather than to the C. t. 

 melanostethus. 



Of the specimens 2 present the adult coloration, 3 of equal size 

 with the adults the obscurely striped, and 1, the smallest, the distinctly 

 striped. 



Measurements. — Total length, 2G8 mm. ; length to vent, 82 mm. ; length 

 to collar, 26 mm. ; length line of auricular meatus, 17 mm. ; length of 



