( Ixxv ) 



Three females with conspicuous pearl-grey mnrgin?. 

 Commenting on the above exhibits, Mr. J. W. Tutt said 

 that Leucania favicolor was entirely restricted to our east 

 coast regions, possibly in a somewhat similar local area to 

 Leucania brevilinea, which was confined also to our eastern 

 coast, except for a record in Holland, but only in very smnll 

 numbers. It would probably be found to have a very fair 

 range on our eastern seaboard, being recorded from Dover- 

 court, Shoebury and Strood, while in colouring it showed as 

 fine a range of variation as any other species of the group. 

 Mr. Mathew had found the species partially double-brooded, 

 bufc probably many of our " wainscots " produce a certain 

 number of individuals in the form of a second brood. 



The President exhibited a photograph taken by his assistant, 

 Mr. A. H. Hamm of the Hope Department, Oxford, and 

 communicated the following note, in which Mr. Hamm records 

 his observation : — 



" On the evening of the 8tli of August last while looking 

 over some Cactus Dahlias growing in my garden, I found a c? 

 Pieris rupee at rest on the petals of a pure white variety, and 

 immediately photographed it in situ, as shown in the print 

 exhibited. 



"Again, on September 1st, in the evening, another $ of the 

 same species was found at rest in an almost identical position 

 on the same plant. 



" And for the third time, on October 8th, yet another c^ of 

 P. rapx was found at rest in a similar position on the same 

 plant. The day succeeding October 8th was dull and chilly, 

 and the butterfly remained without moving the whole day. 

 In the evening of the 9th it was in exactly the same position 

 as that occupied on the evening of the 8th. 



" I had in all some thirty plants of Cactus Dahlias varying 

 in colour from very dark purple-red to red, pink, mauve, orange 

 and yellow ; but only two plants which were pure Avhite. On 

 no single occasion did I observe P. 7-apx at rest on any other 

 flower or plant than the one mentioned. 



" This, I think, is very significant and emphasizes the fact 

 that some insects do discriminate between colours in choosing 

 a resting site, and that in the direction of protective resem- 



