16 PROCEEDINGS OF TIIE NATIONAL MUSEUM vol. 122 



adult male chase and attempt to catch a young A. lineatopus and I 

 have also taken a small A. lineatopus (just above hatchling size) from 

 the stomach of an adult male. Cannibalism is probably relatively 

 rare, partly because the young lizards are too active to catch easily 

 and partly because they avoid the principal perches of the adult 

 males. The difference in perch between young and adult males may 

 be in part a direct result of chasing by the adult males. 



Predation probably is not an important factor in controlHng popu- 

 lation density of adults resident in favorable habitats. Predation is 

 probably heavier on juveniles, on dispersing individuals, and on those 

 living in unfavorable habitats. 



Escape behavior. — Most of my information regarding the re- 

 action of anoles to potential predators relates to their reaction to 

 people. It is possible but unlikely that they react differently to 

 smaller predators. 



I noted that the first reaction of A. lineatopus to an approaching 

 danger is usually to remain still, sometimes flattening against the 

 perch. If the danger approaches closely, the A. lineatopus runs 

 around the perch to the other side and either up out of reach or down 

 into the vegetation at the base. Where possible, adult males usually 

 run upward, small A. lineatopus more frequently dodge around on the 

 trunk or even leave the tree to hide in the cover on the ground. 



Adult males, when they became famiHar with me, did not flee 

 at my close approach but displayed as they woidd at another male. 



A captured hzard usually tries to bite and, if successful, holds 

 on. An adidt male, when seized, frequently shows most of his ago- 

 nistic displays (see p. 38 et seq.), raising dorsal and nuchal crests, 

 lashing his tail, opening his mouth, protruding his tongue, and some- 

 times holding his dewlap open but never flashing it as does a male 

 displaying to another male. 



A captured lizard frequently defecates; the feces produced are 

 usually a pasty material, though they may be very watery or some- 

 times a normal, dry, compact feces. This material is not pleasant to 

 smell nor presumably to taste but it does not smell very unpleasant. 



Elimination of wastes. — As many arboreal animals do, A. 

 lineatopus defecate on whatever perch they happen to be and the feces 

 usually fall to the ground. As might be expected in a species where 

 olfaction is of little importance, the feces do not seem used in marking 

 as Hardy (1962) has suggested they are in Cnemidophorus sexlineatus. 

 The fecal pellets are roughly cylindrical, about 1 cm long, dark in 

 color, and dry and compact to touch. There is a small white cap on 

 the end extruded first; presumably the dark material is fecal material 

 from the intestine and the white cap is nitrogenous wastes from the 

 kidneys. 



