272 MR. E. B. POULTON ON THE PROTECTIVE [Mar. 1, 



of their food for purposes of defence. However, the Lizards fought 

 eagerly for the larvse, and the two successful ones were separated 

 from the rest and remained perfectly healthy. 



June 21. — I. An imago of Smerinthus populi was eaten by the 

 next day, having been seized at once. 



III. One imago of S. populi and two cockchafers (Melolontha 

 vulgaris) were introduced ; by the next day the former and one cock- 

 chafer had been eaten. 



June 25. — I. One imago of S. lubricipeda was eaten at once, and 

 many imagos of P. hucephala. 



III. One imago of 5. ligustri was eaten in a few minutes. 



July 1. — I. One imago of S. lubricipeda and one of Macro- 

 fflossa fuciformis were soon eaten, the former at once. The Lizard 

 did not seize the M. fuciformis with any caution, as if afraid of a 

 sting. 



July 4. — I. Three pupae and two larvae of Vanessa urticcB were 

 eaten at once ; one larva of P. <turijlua was seized at once and 

 chewed for some time, but it was ultimately relinquished, the Lizard 

 seeming to be much irritated by the hairs, and continually opening 

 its mouth. Two imagos of Ennomos angularia and one of A. psi 

 were taken at once. One unnamed larva of a Sawfly was seized and 

 relinquished, but apparently taken again. 



IV. Two pupae of V. urticce were soon taken. 

 V. Three pupae of V. urticce were soon taken. 



VI. One imago of S. ligustri taken. 



August 14.— I. Six imagos of Vanessa io and about eight of V. 

 urtices were introduced, and many were seized at once; but the 

 Lizards were apparently not very eager after them, although they 

 were hungry. However, in twenty-four hours all had disappeared 

 except one V. io, which had got into an inaccessible place, but when 

 brought down it was eaten at once. 



August 16. — I. A few larvae of V. urticce were eaten at once. 

 Two larvae o( Euchelia jacobtete vvere seized at once but relinquished, 

 the Lizards being very hungry. A few hours afterwards they had 

 disappeared and were very probably eaten ; but I do not feel able to 

 speak with confidence, as the larvae are small and might possibly 

 have escaped. 



September 6. — On this date L. muralis and L. viridis were taken 

 to Birmingham and offered distasteful larvae at a meeting of the 

 Biological Section of the British Association. One larva of P. 

 bucephaJa was placed in the cage of L. muralis, and although it was 

 often very severely bitten and for some considerable time by many 

 of the Lizards, it was not eaten. For a day or two before this date 

 the same species of larva had been placed in the cages of i. muralis 

 and L. viridis, and some of them had disappeared, so that I believed 

 that they must have been eaten. Subsequently I was able to confirm 

 this suspicion, for when I was removing the individuals of L. muralis 

 from the travelling cage (Sept. 7), I found the faeces of one of them 

 upon the floor, the excreta consisting entirely of a partially digested 

 larva of P. bucephala. 



