( 3G ) 



feed on the same or some closely allied plant with, perhaps, 

 the same habitat. That is to say, each of the ' models ' of 

 our main local associations is perhaps confined to a large extent 

 to its particular type of country by the fact that its larval food- 

 plant is found there and there only, and it is natural to 

 suppose that its future mimics may Lave been determined on 

 the same basis. 



" It is also interesting to note, in this connection, that 

 Dcmaida here never enters the forest, while the various 

 species of AmaurtS constantly wander away from it. All our 

 Damerincu appear to be sun-loving insects, none are shade- 

 loving as are Aterica and Euphaedra ; obviously therefore it 

 is not this consideration that causes Amawria to make the 



[liii 

 forest their head quarters. /'. dcwdanus also often wanders 

 far afield : one of the best places I know for it is a Bougain 

 viUia bush, a good 1,200 yards from the forest — and it is 

 interesting that it can do this without entirely losing the 

 protection of its Amavria models while at the same time 

 involving, in the person of its trophonitcs female, that of the 

 dominant Daoaine of the territory it is invading." 



Tin. I'.iwi.i; op Skiiu in Birds.— Professor Poulton said 

 that he bad come across a few observations which supported 



the conclusion that birds possessed the extraordinarily acute 

 and far reaching vision required by the Batesianand Miillerian 

 theories of Mimicry. 



1. The distant appreciation of the colour of small insects 

 appealed to be shown by "An Experimental Investigation 

 on the Range of Plight of Flies" by Dr. Copeman, Mr. 

 Howlett and Mr. Merriman (Report I ."C. Gov. Bd. on Public 

 Health and Medical Subjects: New Ser.. No. 53. Further 

 Reports on Flies (No. 4), 1911, p. 8). In these experiments, 



conducted in 1910 at Postwick, about five miles east of 

 Norwich. Hies were liberated after being marked with various 

 colours so that they could afterwards be identified. Yellow 

 chalk was found to give the most satisfactory results, and under 

 favourable circumstances remained perfectly recognisable for 

 a week or, on occasion, for as long as ten days. As soon as 

 these dies were liberated many of them were devoured by 



