(im ) 
females seem seldom to join migratory swarms. Previous 
captures of the insect in Britain are: (1) One 2? in Stephens’ 
Cabinet in the British Museum, szpposed to have been taken 
near London. (2) A ¢ taken in 1881 at Deal, now, I believe, 
in the Dover Museum. (3) Seventeen males taken by Mr. C. A. 
Briggs at Ockham Common, Surrey, in June 1892. (4) A? 
taken in Cornwall, by Mr. Boyd, in June 1903. (5) Two males 
taken June 24, 1908, by Mr. E. R. Speyer, near Shenley, 
Ilerts, and one 2 captured by him at Aldenham Reservoir, 
on July 29 of that year.” 
SEPARATION OF THE SEXES IN HyPoLiMNas MISIPPUS.— 
Dr. F. A. Drxry read a letter received by him from Mr, 
E. A. Acar, of Dominica, West Indies, on the subject of 
the Separation of the Sexes of Hypolimnas misippus, in which 
the writer remarked that in that island, although haunting 
similar localities, the 9 remains on the coast while the ¢ is 
to be met with some distance inland. The former is scarcely 
ever to be seen in conrpany with the d¢ of its own species, 
though it flies with Danaida plexippus, of which it is a mimic. 
Mr. Agar suggested that it looked as if ‘both sexes were 
aware that if they flew in close association it would give 
the show away,” which implies intelligence of too high an 
order. 
Dr, Dixty remarked that it was a common experience that 
one sex of a butterfly at any given time was more in evidence 
than the other. Of course, in such cases it was certain 
that the other sex must be somewhere. Mr. Millar, of 
Durban, had drawn his attention to the fact that, speaking 
generally, the males were more apt to be on the wing during 
the morning, and the females in the later hours of the day. 
Mr. A. R. Wallace mentions that the males and females of 
certain South American Pierines, of which the males are 
practically ordinary white butterflies and the females are 
Ithomiine mimics, have different habits and do not fly together. 
The females accompany their models in flight, which suggests 
the significance of the habit. The fact that some means of 
protection required the adoption of a corresponding habit to 
make them effective, of course did not carry with it any 
assumption of consciousness on the part of the insect of the 
