A TKANSPARENT MOTH. 



679 



look about them, which, on examination with a magnifier, is 

 sliown to be owing to the fact that each siDeck is a single black 

 scale, very long in proportion to its width. There is a slight 

 yellow line marking the edges of both pairs of wings. I need 



Fig. 412. — Helironisa iiiipar. 

 (Transparent, black-speckled.) 



scarcely say that the colour is exactly the same on both sides. 

 Even the body has a very butterfly -like aspect, as if to increase 

 the resemblance. The thorax has a tuft of long, pale brown down, 

 and the abdomen is brown above and yellow at the sides. 



The genus Olisiocampa is familiar to English entomologists 

 on account of the pretty and variable little Ground Lackey 

 Moth {Clisiocampa castrensis). 



The present species is spread over a considerable portion of 

 Europe. Like our own insect, it is so variable that to describe 

 it is not an easy task, the description which would apply to one 

 specimen being quite unsuitable when applied to another. The 

 male is smaller than the female, and of rather brighter colours, 

 the upper surface of the first pair of wings having a beautifully 



