162 



THE WINGS OF NEUROPTERA 



But in those cases, as in the Nemopteridse, where accessory veins are 

 interpolated by the splitting of veins, it is difficult, if not impossible, to 

 determine the homologies of the branches of the radial sector; and it is 



I rca » 



Fig. 157. — Wings of Ulidodes hyallna. 



doubtless best to merely number the branches, first, second, third, etc., 

 beginning with the proximal one, without attempting to indicate the 

 homologies of the veins. 



The radial cuneate area. — In the wings of the Myrmeleonidse, the 

 Ascalaphidae, and of some other Neuroptera there are many instances of the 



Fig. 158. — Wings of Myrmeleon; a species from Katihar, British India. 



expansion of the area of the wing lying between the distal portion of vein 

 R5 and the media or between branches of vein R5, as if a gore had been set 

 into this part of the wing. This condition is well shown in the wings of 



