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; 
(b) 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; (f) 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 Lygzid bug. 
Some experiments with Sceloporus undulatus by Dr. 8. 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: 
Buiatripz#£—Stylopyga orientalis (black)... 
Mantipz—Stagomantis carolina (dark brown)... 
Locustipa—Microcentrum sp. (2T€@N) 0... 
GryLuip#—Gryllus sp. (dark brown)........... . 
COLEOPTERA: 
CaraBipx—Carabide (undet.).... 
Harpalus pennsylvanicus (black)... 
Scarites subterraneus (black) 
CoccINELLID£—Coccinella sp. (warning colors) 
Hippodamia sp. (warning colors) 
Adalia sp. (warning colors) 
Epilachna borealis (yellow and black)... 
DerMestip#—Dermestes sp. (nearly black | “above, 
white below).. 
Lamprrip#=—Chauliognathus sp. (warning COLOFS) 
ScaRaBzIDM—Ligyrus sp. (reddish-brown) 
Lachnosterna sp. (reddish-brown)... 
CHRYSOMELIDZ—Leptinotarsa decemlineata (yellow, and 
black) tae 
Diabrotica sp 
bo 
NH NW 
Po oer SUR HHP 
Heteroptera (all strong smelling) : 
PENTATOMIDZ—Brochymena sp......... 
Nezara hilaris (green) 
Repuvip#—Arilus cristatus (red-brown, wings with 
bronzed tips) 
aH aa 
