192 



THE WINGS OF NEUROPTERA 



Figure 184 is a reproduction of camera lucida drawings of the pupal wings of 

 Chrysopa nigricornis made by Mr. R. C. Smith. 



In order to show more definitely the composition of the two serial veins 

 a diagram of an adult wing is given (Fig. 185) in which the elements of the 

 coalesced veins are represented slightly separated, and the cross-veins 

 connecting the coalesced veins are represented by dotted lines. By com- 

 paring this diagram with Figure 186 the homologies of the different veins 

 can be recognized. 



{0) THE WINGS OF THE GSMYLID.^ 



The Osmylidffi is a moderately large family and is composed of very 

 beautiful insects. The wings of Osmylus hyalinahis (Fig. 187) can be taken 

 as an illustration of the type of wings characteristic of this family. There 



Fig. 187. — Wings of Osmylus hyalindlus. 



is no difficulty in recognizing the identity of the veins in these wings; but 

 the more important ones are lettered in Figure 188. 



The subcosta and vein Ri are closely parallel and are somewhat stouter 

 than the other veins; they constitute the supporting axis of the wing. 

 These two veins coalesce at the tip. The humeral vein is not markedly 

 recurved and is not branched. The costal area is broad and the accessory 



