196 THE WINGS OF NEUROPTERA 



In the fore wings of Nymphes (Fig. 191), the radial fork is quite near the 

 base of the wing; there is a fairly well developed secondary cubital fork; 

 and the primary cubital fork is near the base of the wing ; vein Cuo is easily 

 recognized; it branches off from vein Cu nearly opposite the first medio- 



Fig. 191. — Base of fore wing of Nymphes myrmeleonides. 



cubital cross-vein, and the basal part makes a sweeping curve; it touches 

 the first anal vein at the end of this curved portion, and then extends free 

 from it. There are three anal veins; vein ist A is forked. 



In the hind wings (Fig. 190), media is two-branched, a fact that has not 

 been understood, vein M3+4 having been mistaken for vein Cu. This 

 mistake was due to two facts : first, the medial fork is very near the base 

 of the wing and has been overlooked; second, vein M3+4 bears prominent 

 accessory veins which cause it to closely resemble vein Cui of the fore wing. 



The cubital fork, as in the fore wing, is very near the base of the wing ; 

 and the basal part of vein Cuo is transverse, appearing like a cross-vein 

 except that it is much stouter ; it resembles in this respect this vein in many 

 of the Myrmeleonidae. The .anal veins are similar to those of the fore wing. 



Marginal dots are present in the wings of Nymphes; this seems remark- 

 able as they are absent in the other families of the myrmeleonid group ; the 

 marginal dots are not represented in the figures given here. 



ir) THE WINGS OF THE MYRMELEONID^ 



In the Myrmeleonidae the wings are long and nan-ow and delicate in 

 structure; they are furnished with many accessory veins, both definitive 

 and marginal, and with very many cross-veins (Fig. 192) ; the radial sector 

 is pectinately branched. 



Although the wings of myrmeleonids have been much studied no one 

 has published as yet a coirect and complete determination of the homologies 



