CROCODILIANS, LIZARDS, AND SNAKES. 



657 



inclosing a black one, the upper on each side along the center of one row 

 of scales and separated by six dorsal rows. Four equal and equidistant 

 black dorsal stripes between the white ones, each on two adjacent 

 half rows of scales, the exterior margining the white lines, the inner 

 obsolete in old specimens. Beneath greenish white, more yellowish 

 under the chin, lower white line passing above the ear. Upper labials 

 white. A faint whitish line below the thigh, margined above and below 

 with dusky. 



The frontal is sometimes very small or even wanting, and always 

 (with rare exceptions^ cut off from contact with the postnasal. In one 

 specimen it is applied against the frontal. In the most typical speci- 



Fig. 133. 

 Edmeces septenteionalis Baied. 



Kansas. 



Cat. No. 4722, U.S.N.M. 



mens the frontal, the postfrontal, and internasals are all rhomboidal, 

 the latter rather smaller and transversely; the rest about equal, their 

 longer axis longitudinal. 



In the smallest specimen of Cat. No. 3156 the hind legs reach forward 

 half way to the center of insertion of fore leg, the third application 

 falling a little short of the nose. In the other two, however, three appli- 

 cations of this length reaches only to the ear. The small specimen has 

 longer limbs than the largest, in which the hind foot from heel is con- 

 tained five times in head and body. The white lateral lines are very 

 well defined and narrow, the upper beginning on the superciliary edge, 

 the lower beneath the eye on the upper edge of the fifth labial and 

 passing upwards so as to proceed backwards along the upper edge of 

 the ear and not through it, as in most species. Posteriorly, it usually 

 passes along the center of the second row below that traversed by the 

 upper line, the black interval being then 1 and | scales wide. Fre- 

 quently these intervening black scales are olivaceous at their bases, so 

 NAT MUS 08 -IL' 



