Explanation of Plates. 321 



the hind, is not mimetic of the resjjective Danaine 

 (Fig. 1) and Acrasine (Figs. 2 and 3) models, but presents 

 an appearance synaposematic with many Acrseas of 

 about the same size. During flight, on the other band, 

 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. 



