JSb/.] VALUE OF COLOUR AND MARKINGS IN INSECTS. 243 



Coloured, or which evade their Enemies by other means. 



Experimental evidence. 



E. B. Poulton. 



Laev^. 



J. Jenner Weir. 



Otlier observers. 



Bearing upon Wallace's 

 converse suggestion. 



A. Weismann. — 

 Devoured by La- 

 certa viridis. 



A.G.Butler.— Eaten 

 by L. viridis. Lar- 

 vae of this genus and 

 of Hadena eaten by 

 many birds ie. g. 

 Robins). 



Support. 



Support. 



Eaten by Lizards . 



! Support, as "with last species. 



Eaten by Zootoca 

 vivivara. 



Eaten greedily by L. muralis. 

 The larvae had been found on 

 Acoiiitum napellus, but the 

 Lizards were unharmed by the 

 poisonous food in the larval 

 digestive canal. 



Eaten greedily by Hyla 



At once attacked by L. muralis, 

 the larva being immediately 

 detected, although rolled up 

 and motionless. Nevertheless 

 the Lizard evidently much 

 disliked it, and after being se- 

 verely bitten, it was rejected ; 

 others tasted the larva with 

 the same result. 



The " larvae only 

 which ventured 

 beyond the pro- 

 tection of the web 

 were eaten " by 

 birds. The birds 

 " appear very 

 much to dislike 

 the web sticking 

 to their beaks." 



Strong support, from the special 

 character of the concealment. 



Support. 



Support. 



At first sight a most startling 

 difficulty. Yet it was evident, 

 from the behaviour of the 

 Lizards, that they fully ex- 

 pected the larva to be palat- 

 able ; in itself a strong confir- 

 mation of the suggestion that 

 nearly all such larvse are 

 palatable. 



Support. Being defended by the 

 web there is no necessity for a 

 specially perfect form of pro- 

 tective resemblance. 



