22 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



His activity range was 3 square yards on the ground and extended 

 upward about 3 yards. 



In areas with more perches available, the activity ranges are larger 

 in horizontal dimensions. In the Barbican brush heap sho\\Ti in 

 figure 3, the three resident males had areas of approximately 13, 8, 

 and 6 square yards; the first of the males using a small tree regularly 

 climbed to 6-8 feet, while the other climbed only to about 3 feet. 

 The activity ranges of these males were ovals except that the largest 

 had an elongate projection along the fence. 



The other males at Barbican [fig. 4] had activity ranges that fall within the 

 3-10 yard size range. The relationship of perches to activity range shape is 

 conspicuous in figure 4. The activity range of no. 2 was located on the front 

 porch of my house. He used the L-shaped railing as a perch; the observation 

 records of him outline the railing just as the concentration of observations along 

 the fence indicates the position of the fence posts. 



On an abandoned stone aqueduct, the males were found living mostly under 

 the arches and usually restricting their activity to a single arch. Those 16 males 

 on which we have adequate data had activity ranges varying from 4 to 16 square 

 yards in area and mostly between 4 and 8 square yards. They extended verti- 

 cally between 2 and 10 feet. The activity ranges were mostly quadrangular in 

 plane view, reflecting the shape of the area under an arch. 



The size of the activity ranges of the adult females is usually con- 

 siderably smaller than that of those of the adult males, and again 

 structure of the habitat affects size and shape. In general, the female 

 activity ranges averaged about 1 to 2 square yards, sometimes being 

 as much as 3 or 4 square yards and probably sometimes only 2 or 3 

 square feet. In vertical extent the females usually ranged from 1 to 5 

 feet and probably sometimes more. 



In the isolated tree shown in figure 2 there were 9 resident females. Of these, 

 8 concentrated their activities below 3 feet, in the ferns at the base and the rock 

 border around it, occasionally climbing the tree to the height of 6 or 8 feet. One 

 female concentrated her activity on the trunk and the side branches between 5 

 and 9 feet above the ground and only rarely came down into the ferns. For 

 each of these females, the activity range was about 1 square yard in horizontal 

 extent. 



In the Barbican brush heap [fig. 5], which was more complex in perch distri- 

 bution, 3 adult females (nos. 59, 145, and 162) had activity ranges of 1, 1, and 2 

 square yards and ranged vertically between }4 and 4 feet. The other females in 

 Barbican [fig. 6] have activity ranges that are usually between 1 and 3 square 

 yards in area. 



The activity ranges of lizards below adidt size are somewhat 

 smaller than those of the adults of the same sex and increase as the 

 lizards grow. 



Figure 3. — Activity ranges of three adult males (no. 1=59 mm; no. 6=63 mm; no. 159=58 

 mm) in Barbican brush heap, January 23 to February 23 (hea\y continuous lines = 

 approximate activity range boundaries, fine lines = physical features, remaining lines= 

 boundaries of brush heaps). 



