48 A SYNOPSIS OF THE SPECIES OF 



Caemidophorus gularis sericeus Cope. 



Scales of the collar moderate, subequal, in four or five I'ows, marginal scales 

 equal to the others. Mesoptychial scales considerably smaller than the gular scales, 

 which are large, and extend from one ramus to the other. Scales of the back 

 rounded, not prominent, small, measuring .033 mm. Supraorbital plates wider than 

 long except the anterior, and not separated from the frontoparietals by scales. Inter- 

 parietal large, not twice as long as wide ; parietals subtriangular, as wide as the inter- 

 parietal, but much shorter. Frontoparietals remarkable for their small size, and from 

 their terminating each in an angle anteriorly, which receive between them the pos- 

 terior apex of the unusually narrowed frontal. They are smaller than the parietals, 

 which are smaller than in other species. If these characters prove constant^ I shall 

 regard this form as a true 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 eight, tibials in three rows. Femoral pores twen- 

 ty-one. The hind limb extended reaches the posterior border of the orbit. 



Size medium. Length of head and body (tail injured) 81 mm. ; length to angle 

 of mandible 22 mm.; to edge of collar 2(3 mm.; to axilla 31 mm.; to fore limb 

 26 mm. ; of fore foot 14 mm. ; of hind leg 60 mm. ; of hind foot 32 ram. 



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. sexUneatus, 

 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 sur- 

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

 faintly spotted with paler above and posteriorly, and the forearm reticulated with 

 black posteriorly. The dorsal stripes, except the three median, extend as far as the 

 orbit. Rest of head olivaceous. Lower surface of head, limbs and tail, yellow, the 

 first named with a bluish transverse patch across the gular region. 



This species has various peculiarities. It differs from the other members of the 

 C. gularis series in the larger number 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 

 interparietal and parietal plates. Its posterior legs are longer than in any species 

 except the C. variolosus. 'No species has four rows (or three at the narrowest part) of 



