348 Mr. C. F, M. Swynnerton's Experhnents 



acceptable, but not quite equally unacceptable. I am 

 inclined to state as follows the grades that were indicated : — 



(1) Pseudacraea lucretia var. exfcinsa and Charaxes 



ethalioti. 



12) Papilio demodocus. 1 rii w 



/o\ 75 -r- J J } (Jharaxes citnaeron. 



{6) rapilio daraaniis. J 



(4) Acraea acara, A. aglaonice, A. caldarena and Danaida 



chrysippiis. 



Pyrameis cardui eggs would appear from at least one 

 experiment to be preferred to those of P. dardanus, but they 

 cannot, I think, be very much higher. Hypolimnas misippus 

 and Eurytela hiarhas eggs would appear to be as low as 

 that of P. dardanus, but the extent to which they were 

 genuinely tried seems doubtful. 



The eggs tested cover quite a considerable range of 

 appearance, and this, with the fact that when we ourselves 

 search for it with the closeness that is habitually employed 

 by its natural enemies we have relatively little difficulty 

 in finding the average leaf-laid egg, at least suggests that 

 it is not amongst such eggs but amongst those that are 

 concealed in earth, stems, etc., that we must look for the 

 higher grades of palatability. The inference that it was 

 through repugnance to them that the ants avoided the 

 eggs was confirmed by their repugnance to newly-hatched 

 larvae as compared with older ones. 



3. Experiments on Cockroaches, a Cricket and a 

 coccinellid. 



April 28th, 1913. — Early in the day I placed in a small 

 gauze-covered box with two live larval cockroaches thirteen 

 eggs of Acraea aglaonice, twelve of Acraea caldarena, ten 

 of Pyrameis cardui and three of Papilio dardanus $ f. 

 hippocoon. None had been eaten by evening, and during 

 the evening the cockroaches escaped. I replaced them at 

 about 10 p.m. in the evening by two adult and three larval 

 cockroaches of the same species. 



I left in another small box with a female of the carnivor- 

 ous ladybird Alesia hidentata a number of eggs of A. 

 caldarena, three of hippocoon and one of P. cardui. 



[Cockroaches were of our common Gazaland species.] 



April 29th. — No developments in the cockroach box. In 

 the other box the Alesia, instead of eating the egg, has 



