574 



REPORT OF NATIONAL MUSEUM, 1898. 



longer than the postnasal, and there is no frenoorbital. The first pair 

 of infralabials are in contact on the median line throughout their length. 

 Besides these there a; e four infralabials on each side, which are sepa- 

 rated from the inferior labials by tour plates on each side, which are 

 preceded by a few granules. Tiiere are four rows of brachial and 

 three rows of antebrachial scuta (only two rows at the middle of tlie 

 forearm). The femorals are in seven rows, the second from the front 

 the largest. The tibials are in three rows, the front the largest. There 

 are three large anal plates, two posterior and followed by a granular 

 space anterior to the vent. The edge of the collar is granular, and the 

 granules form a triangular area with the apex forward. On each side 

 of this the scales are about as large as those on the middle of the throat 

 between the jaws. The extremity of the fourth toe of the extended 

 hind limb reaches to halfway between the humerus and the ear. Fem- 

 oral pores 19 on each side. 



MeamremenU. — Total length, 2G0 mm.; length of head and body, 86 

 mm.; length of head to angle of jaws, 22 mm.; to edge of collar, 26 

 mm.; to axilla, 31 mm.; length of forearm from axilla, 27 mm.; length 

 of fore foot, 11 mm.; length of hind leg, 58 mm.; length of hind foot, 

 30 mm.; width of head behind orbit, 10 mm. 



The color has already been mainly described. The thigh and tibia 

 are longitudinally marbled with dark olive on a pale olive ground. 

 Head, fore limbs, and tail unspotted. 



The specimen described is the largest obtained, and it is probably 

 adult. Its colors are rather obsolete, while those of three younger 

 specimens are as strongly contrasted as in the young of any other form. 

 Among all the striped forms of the C. tesfieUatus, this one is distin- 

 guished bj^ the presence of seven stripes and no spots. It is, so far 

 as yet known, confined to the valley of the Kio Grande Kiver. 



Cnemidophorus tessellatuif perplexua Baird and Girard. 



A specimen in the museum of the school of biology of the University 

 of Pennsylvania, of about the size of the type above described, agrees 

 in all important respects with it, with the fidlowing exceptions: The 

 second and third iiifralabial plates are in contact with the labials and 

 not separated by plates, although some minute granules are iJiesent. 

 There are six rows of brachial plates at the middle of the humerus and 

 three of antebrachials. The light and dark stripes present a strong 

 contrast of color, the former being rosy and the latter pure black. 

 The third black stripe on each side is broken into approximated 



