Explanation of Plates. 321 
the hind, is not mimetic of the respective Danaine 
(Fig. 1) and Acreine (Figs. 2 and 3) models, but presents 
an appearance synaposematic with many Acreas of 
about the same size. During flight, on the other hand, 
and probably during brief rest, nearly the whole of the 
fore-wing under-side is revealed, and the effect is then 
such as to reinforce the mimetic resemblance of the 
upper-side. 
SEPTEMBER 22nd, 1906. 
