284 ANNIE H. PRITCHETT. 



Three other species of lizards were placed in the same cage 

 with Crotaphytits collaris, from which the following results were 

 obtained : 



1. Cncinidophonis sexlineatns Linn. One specimen was caught 

 December I and died January 7 during which time it was never 

 seen to take any food. This was also the case with two small liz- 

 ards of this species that were in the cage with Sceloporns. They dis- 

 appeared mysteriously and are supposed to have been devoured. 

 The lizard is quite common, but difficult to catch, and it is re- 

 gretted that more were not obtained for the experiments. 



2. Holbrookia texana Trosch. Two of these lizards were 

 placed in the cage early in April and have never been seen to take 

 any food. 



Emucccs sp. This small lizard was captured March i 2. On 

 March 30 it tore up and ate the body of a butterfly, Pi en's occidcn- 

 talis Reakirt. April 6 it caught, tore to pieces and ate a cricket 

 larger in circumference than itself. April 8 it ate a large house 

 fly and on April 10 a number of small mantids, Staginoinantis 

 Carolina, recently hatched. The lizard was very alert, spying 

 the mantids at a distance of several inches, though the latter 

 were quite small and exactly the color of the sand on the floor of 

 the cage. On April 23 and May 8 other young mantids of the 

 same size were eaten. 



Phrynosoma cormttuni Harl. The "horned toads" were kept 

 in cages with other lizards and also separately and were never 

 seen to eat anything but ants. They are especially fond of the 

 large agricultural ant, Pogonomyrmex barbatus Smith var. uwlc- 

 faciens Buckley. 



GENERAL SUMMARY. 



1 . Only one instance is known of a lizard eating a dead insect. 



2. Insects that move slowly do not attract the attention of the 

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

 remain quiescent are rarely even attacked. 



3. Insects below a certain size are apparently not perceived by 

 the large species of lizards. Examples of such insects are Dia- 

 brotica punctdta Oliv., Micryxis distinctns Hald., and various ants 

 (Camponotus). 



