DEFTH OF COLOUR.. 



457 



Though not so large as the preceding insect, it is a 

 handsome species, for whereas the former species is entirely 

 black with a single spot of white on each wing, the present 

 species is strongly glossed with blue. This effect is obtained 

 by means of a soft, velvet-like pile, which even extends to the 

 head. The wings are transparent and yellow, while the nervures 

 are rust-red, becoming black at the base. There is a slight pale 

 brown border to the wings. The legs, especially the hind pair, 

 are armed with a number of bold tooth-like spines, thereby 

 contrasting with those of the previous species, which are 

 unarmed. 



The magnificent insect which is here shown is one of the 

 largest of the Hymenoptera, and is very handsome, not only 



'Fig. 238.— Pcpsis elevata. 

 (Black green.) 



on account of its size, but by reason of its splendid colouring. 

 Like many insects, the colouring is so deep that a very strong 

 light is required in order to bring out its beauties, and, if the 



