190 



THE WINGS OF NEUROPTERA 



of several species of Chrysopa, and has kindly furnished me with the 

 material upon which the accompan^dng figures were based. 



A superficial examination of a wing of an adult Chrysopa (Fig. 183) 

 reveals the presence of two longitudinal veins between the radial sector and 



Fig. 183. — Fore wing of Chrysopa nigricornis; M', pseudo-media; 

 Cu', pseudo-cubitus. 



the inner margin of the wing, one of which appears to be the media and the 

 other vein Cui ; but each of these, as is shown later, is a serial vein composed 

 of sections of several veins. 



As it would be impracticable to apply to these veins names indicating 

 their composition they have been designated by Tillyard ('16) as the 

 pseudo-media and the pseudo-cubitus respectively; and he makes use of the 

 notation M' for the pseudo-media, and Cu' for the pseudo-cubitus. This 



Fig. 184. — Trachcation of the wings of a i)upa of Chrysopa nigricornis. 



