CROCODILIANS, LIZARDS, AND SNAKES. 589 



ground of the su])erior surfaces is marked with numerous ratiier small 

 yellowish oval spots. Those of the sides are irregularly disposed, but 

 those of the superior surfaces are arranged in six more or less irregu- 

 lar series. Of these the two extermil ou each side correspond with the 

 two external stripes of the young of the C. te-ssclUtlns. Ou the nape the 

 series lose their regularity, and on the nape region they are more fre- 

 quently transverse. The hind legs are olivaceous, marked with numer- 

 ous irregular oval yellow spots. Xo stripe on the posterior face of the 

 femur. Head without spots or stripes. Gular region dark olive ; thorax 

 blackish : belly yellowish, the scales with black bases. Tail olive with 

 scales above yellowish at the base, brownish beyond; below brown 

 except the basal fourth, which is yellowish with black spots on most of 

 the scales. Posterior limbs with oval yellowish spots ou an olivaceous 

 ground. Femur not stri])ed behind. 



This species resembles the C. maxhnus in the increased number of 

 its femoral pores and femoral and brachial scales, but is distinguished 

 by its much longer hind leg, spotted coloration and much smaller size. 



Cntmidophorus tessellatiis variolosus Cope. 



CNEMIDOPHORUS OCTOLINEATUS Baird. 



Cnemidophonis octolincatns Baikd, Proc. Atad. Nat. .Sci. Phila., 1858, p. 255; U.S. 

 Mex. Ijound. Surv., II, 1859, Pt. 2, Rept., p. 10.— Cope, Check List Batr., Kept. 

 N. Amer., 1875, p. 45. 



Interparietal plate subquadrate, about equal parietals; both bounded 

 posteriorly by small scuta. Superior labials live to below middle of 

 orbit; the last wedge-shaped. lufralabials ttve, first pair in contact 

 throughout their length. Brachial plates in five rows, continuous with 

 the three rows of antebrachials. Femorals in six, tibials in three rows. 

 Femoral pores, 17. Anal plates three large ones, two i)osteriorly and 

 one in front, and all surrounded, except behind, by eight or nine smaller 

 plates. Dorsal and lateral scales oval, the long diameter anteroposte- 

 rior, and arranged in transverse rows. Surface smooth. Larger scales 

 of collar not interrupted at middle; mesoptychial scales little reduced. 

 Extended hind leg reaching to half way between shoulder and audi- 

 tory oneatus. 



Measurements. — Size small. Total length, 184: mm.; length to angle 

 of mandible, 15 mm.; to edge of collar, 19 mm.; to vent, 00 mm.; to 

 axilla, 25 mm.; of fore leg, 20 mm.; of fore foot, mm.; of hind leg, 38 

 mm.; of hind foot, 20 mm. 



The general color in spirits is bluish olive, darker above and lighter 

 below. This is traversed on the dorsal region by four pale, narrow 



