AMPHIBIANS AND REPTILES. 199 
Teeth minute. Interorbital space equal to gape. Ear smaller 
than eye, oblique. Scales firm, not especially hard, about 68 
from tip of mandible to vent, and 60 more to tip of tail. About 
42 scales transversely around middle of trunk. Cephalic plates 
largely smooth, especially in front and on sides of head, and 
others somewhat longitudinally rugose. Frontal plates 2, 1 
before the other, anterior undivided, and with still another small 
Pine Tree Lizard. Sceloporus undulatus (Latreille). 
anterior I so arranged as to be surrounded by 4 cephalic plates. 
Supraorbital region with a crescentic series of 5 large transverse 
series, and embracing a short series of 3 or 4 additional outer 
and inner series of small plates in its concavity. Scales on back 
and rump about equal, smaller than those near base of tail. Lat- 
eral scales much smaller than dorsal. Dorsal scales angularly 
