38 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



bear little resemblance to those used in the first case and, in fact, any 

 division seems to be arbitrary. 



A basic rule in distribution of A. lineatopus seems to be that no two 

 lizards of the same size can have widely overlapping activity ranges. 

 This general rule seems to apply at all sizes, from the smallest studied, 

 22-24 mm, to the largest adult males, ca. 70 mm, and to apply regard- 

 less of sex. Anolis lineatopus of different sizes, however, may have 

 widely overlapping activity ranges. Usually the activity ranges of 

 adult males overlap those of adult females, which frequently in turn 

 overlap those of small juveniles. The activity ranges of the small 

 males frequently are like those of similar sized females, but also, and 

 much more frequently than females, they are in areas that are unin- 

 habited by otlier lizards, either male or female, and some of which, 

 because of the structure or situation, seemed subpreferable. The 

 distribution of adult A. lineatopus relative to one another resembles 

 one of the common patterns seen in vertebrates, that of territoriality. 

 The distribution of the juveniles with respect to one another, particu- 

 larly to the adults, is more novel. 



Social Behavior 



The regular arrangement of activity ranges with respect to one 

 another is largely tlie result of direct interaction between indi\adual 

 A. lineatopus. These interactions fall into two categories, agonistic 

 behavior and courtship. These interactions, and the display asso- 

 ciated with them, are common and make up most of the social be- 

 havior of the species. As is general in lizards, parental care, flocking, 

 play, allogrooming, and alarm signalUng are absent. Perhaps 

 important in certain circumstances but hardly true social behavior 

 is predation by adult male A. lineatopus on juveniles of the species 

 (see p. 15). 



An adult male A. lineatopus probably spends more time in display 

 than in any other activity except sleeping and watching. One male 

 that I watched for about 11 hours gave 181 displays (averaging about 

 one every 3}^ minutes). During this tune he was involved in two 

 conflicts with other adult males, copulated twice, and courted unsuc- 

 cessfully several additional times. In the 8 hours from 8:00 a.m. 

 until 4:00 p.m. there were only 5 periods longer than 10 minutes 

 when no display was seen, the longest being about 30 minutes. 



Before describing agonistic behavior and courtship and discussing 

 their effects on the spatial organization of the population, it is neces- 

 sary to digress briefly into a description of the various displays ob- 

 served in A. lineatopus. 



Display. — No analysis is given here because the displays of West 

 Indian Anolis, including A. lineatopus, are under study by Dr. R. 



