1940] 
Mimicry and Warning Coloration 
5 
tion is shown in the case of the Chrysomelid Crypto cephalus 
viridipennis Suffr., a shining metallic blue-green beetle with 
dark reddish brown pronotum and transverse band on elytra. 
Of three specimens placed with three separate Anolis sag- 
rei , one was not eaten after six days, another after five 
days, but one was taken after four days. Whereas Anolis 
ate more or less quickly three closely related species : Cryp- 
tocephalus 5-punctatus Suffr. yellow with black spots, C. 
commutatus Suffr. reddish brown to metallic blue with yel- 
low marks, and Pachybrachys parallelopedus Suffr. with 
brown and yellow markings. 
Three species of brightly colored Coccinellidse, Chilocorus 
cacti (L.) Cycloneda sanguinea (L.) and a third unnamed, 
were refused by Anolis sagrei. 
Edible Coleoptera 
With the bright colored inedible beetles were put sombre 
beetles that Anolis usually ate without hesitation. Two such 
beetles were the Elaterids Conoderus bifoveatus (Beauv.) 
and Aeolus sp. Darlington mentions others that he used. 
Also an occasional house fly and a cockroach nymph was 
greedily snapped up by the lizards. 
Discussion 
Darlington found, in his feeding experiments with Thonal- 
mus , that his results were absolute and surmised that they 
might prove to be statistical instead. That they may be 
statistical is shown by the present writer, especially in the 
case of Trichrous. 
Another implication brought out by the experiments is 
that the feeding habits vary with the individual, probably 
as a result of the experience of each lizard. 
An interesting aspect of the experiments is the variation 
in the markings of insects which are refused for no apparent 
reason other than mimicry or warning coloration. In some 
cases, as Chalepus and Drapetes , the mimicry is not close. 
Or a beetle, such as Oedionychis, may have the models’ colors 
in a very different pattern. One beetle, Crypto cephalus viri- 
dipennis, has only one of the models’ colors. Also the colors 
of Thonalmus and the inedible Hemiptera are similar. So 
