muir SO Lae VICINITY OF NEW VORK CITY 117 
The Fence Swift, Sceloporus undulatus (Fig. 20), common 
everywhere in the southern United States, is very rare within a 
radius of fifty miles of New York City. In the pine 
forests of southern New Jersey this agile creature is 
particularly abundant, and may be seen darting with 
bewildering speed along fences and fallen trees. 
Fence 
Swift. 
was 
FIG. 20. FENCE SWIFT 
Unlike the Blue-tailed Lizard, so conspicuous on account of 
its shining scales, the Fence Swift presents a rough, lusterless 
surface. The scales are keeled and terminate in sharp, spine- 
like fashion. The body is rather broad, the head wide. In 
color this lizard is gray or brown with a series of V-shaped 
blotches on each side of the body; the underside is dark-gray or 
black with several large patches of blue. The latter patches 
vary in intensity according to conditions of temperature and the 
