1912.] NATURAL SCIENCES OF PHILADELPHIA. 299 



neatus, Eumeces sp., and Phrynosoma cornutum. A large variety of 

 invertebrates were offered the lizards, with the following principal 

 results: (a) Only one instance of a lizard eating a dead insect; 

 (6) insects that move slowly do not attract the attention of the 

 lizard so much as do the more active forms, hence those that remain 

 quiescent are rarely even attacked; (c) insects below a certain size 

 are apparently not perceived by the large species of lizards; (d) 

 large beetles having hard elytra are seldom eaten; (e) the myriapod 

 Julus was not eaten by any lizard ; (/) although the combinations of 

 black and yellow, black and orange, or black and red are supposed 

 to serve the purpose of warning coloration, all insects possessing 

 these colors were, at one time or another, eaten, with the possible 

 exceptions of Panorpa nuptialis Gerst. and a malodorous Lygseid bug. 

 Some experiments with Sceloporus undulatus by Dr. S. D. Judd 

 which have never been published may now be put on record for 

 purposes of comparison with the series just noted. The results of 

 these tests follow: 



Orthoptera : 



Blattid.e — Stylopyga orientalis (black) A 2 



Mantid^e — Stagomantis Carolina (dark brown) R 



Locustid^b — Microcentvum sp. (green) R 



Gryllid^e — Gryllus sp. (dark brown) A 3 



Coleoptera: 



Carabid^e — Carabida? (undet.) A 



Harpalus pennsylvanicus (black) A 



Scarites subterraneus (black) R 



Coccinellid^e — Coccinella sp. (warning colors) R 2 



Hippodamia sp. (warning colors) R 



Adalia sp. (warning colors) D 



Epilachna borealis (yellow and black) A 



Dermestid^e — Dermestes sp. (nearly black above, 



white below) A 



LampyridjE — Chauliognathus sp. (warning colors) R 



Scarab^eid^e — Ligyrus sp. (reddish-brown) R 2 



Lachnostema sp. (reddish-brown) R 2 



Chrysomelid.e — Leptinotarsa decemlineata (vellow and 



black) R2 



Diabrotica sp A 



Heteroptera (all strong smelling) : 



Pentatomid^e — Brochymena sp R 



Nezara hilaris (green) R 



Reduviid^e — Arilus cristatus (red-brown, wings with 



bronzed tips) R 



