428 Mr. Cecil W. Barker on Seasonal Dimorphism. 
There are three important examples of seasonal varia- 
tion in the family Nymphalidsej which, since writing 
my notes, I find I have inadvertently omitted to mention. 
The first of these, Melanitis leda, belongs to the subfamily 
Satyrinse, and the other two. Precis tugela and Salamis 
anacardii, to the subfamily Nymphalinse, Each of these 
three species show, in their late season (late summer 
and antumn) forms, a very marked prolongation of the 
apices of the forewing, both outwardly and downwards. 
This projection, in the early season broods, is in each case 
much modified or blunted, and is not produced downwards. 
They are also smaller, and show contracted but better- 
defined markings to both upper and undersides. It is 
curious that these three species, generically distinct, and, 
in the case of M. leda, belonging to a difierent subfamily, 
but possessing in common this marked prolougation of 
the apices of the forewings, should all modify seasonally 
on similar lines. 
