194 



THE WINGS OF NEUROPTERA 



The wings of Myiodactyltis resemble those of Osmyhis (Fig. 187) in their 

 general appearance and in most of their structural details. The most 

 important differences are that in Myiodactyliis there are many cross-veins in 



Fig. 189. — Wings of Myiodactyliis pubescens. 



the subcostal area, the media of the fore wings is not forked, and vein Cu2 

 of the hind wings is lost. 



The most striking features of the wings of Myiodactylus are a broad 

 border of accessory veins that extends completely about the wing and which 

 is free from cross-veins and a discal area which is abundantly supplied with 

 cross-veins. In this respect the wings resemble those of Osmyhis (Fig. 187); 

 but the border is more complete than in Osniylus, due to the fact that vein 

 Sc-1-Ri is curved back so that it does not interrupt the border, being con- 

 tinued to the margin of the wing only by accessory veins. 



The humeral vein of the fore wing is forked but it is not of the recurved 

 type. A series of gradate veins extends from the tip of vein Sc+Ri to the 

 tip of media; this is quite similar to the condition in Osmylus, except that 

 in Osmylus vein Sc + Ri extends beyond the end of the series of gradate 

 veins. 



In the fore wings, media extends free from radius to the base of the 

 wing; it is not forked, and there is no oblique vein representing vein M3+4. 

 The cubital fork is near the base of the wing, and there are three separate 

 anal veins. 



