608 REPORT OF NATIONAL MUSEUM, 1898. 



parietal large, not twice as long as wide; parietals sub triangular, as 

 wide as the interparietals, but much shorter. Frontoparietals remark- 

 able for tlieir small size and from their terminating each in an angle 

 anteriorly, which receive between them the posterior apex of the frontal. 

 They are smaller than the parietals, which are smaller than in other 

 species. Infralabial plates six on each side, the last one small; the 

 first pair separated at the posterior angle. Brachial scales in six rows ; 

 antebrachials in four. Femorals in seven, tibials in three rows. 

 Femoral pores 21. The hind limb extended reaches to the posterior 

 border of the orbit. 



Measurements.— Size, medium. Length of head and body (tail in- 

 jured), 81 mm.; length to angle of mandible, 22 mm.; to edge of collar, 

 26 mm.; to axilla, 31 mm.; of fore limb, 26 mm,; of fore foot, 14 mm.; 

 of hind leg, 60 mm. ; of hind foot, 32 mm. 



Ground color above anteriorly black, posteriorly olive. This is 

 marked by six narrow lines of a paler olive, which represent the lines 

 of the C. sexlineatus, with an additional median dorsal one. These 

 fade out or become very indistinct on the lumbar and sacral regions. 

 The interspaces, black anteriorly, are marked at first by small olive 

 spots, but these enlarging, break up the black ground into spots, but 

 these fade out on the middle of the length. The superior surfaces of 

 the limbs and tail are olive, the latter unspotted; the hind limbs 

 faintly spotted with paler above and posteriorly, and the forearm retic- 

 ulated with black posteriorly. The dorsal stripes, except the three 

 median, extend as far as the orbit. Eest of head olivaceous. Lower 

 surface of body bluish olivaceous. Lower surface of head, limbs, and 

 tail, yellow; the first named with a bluish transverse patch across the 

 gular region. 



This subspecies has various peculiarities. It differs from the other 

 members of the C. sexlineatus series iu the larger numbers and more 

 equal size of the scales of the gular fold, approaching in this way the 

 C. tessellatus, but not agreeing with it, since the marginal scales are not 

 smaller. It differs from all the species in the small size of the interpari- 

 etal and i)arietal plates. Its posterior legs are longer than in any species 

 except the G. variolosus. No species has four rows (or three at the 

 narrowest part) of antebrachial scales; the usual number being two to 

 three ; and the femorals are more numerous than in the C. g. gular is. The 

 coloration is also quite distinctive. But one specimen is known, and 

 that is from southwestern Texas. The discovery of other specimens 

 will determine whether this is or is not a true species. In the obsoles- 

 cence of the color pattern posteriorly it resembles the C. g. semi/asciatus, 

 which follows. 



Cnemidophorua gularis sericeus Cope. 



