THE WINGS OF DILARIDM 



185 



the primitive position of the radial fork in this family we can not be sure 

 that this is the case. 



In the Dilaridse the forking of the branches of the radial sector has 

 progressed to a much greater extent than in the Hemerobiidae. 



These two features are well shown in Dilar uohirce (Fig. 179), from 

 Yoshino, Japan, wings of which were kindly given to me by Mr. Waro 

 Nakahara, the describer of the species. 



A remarkable feature of the wings of Dilar nohira: is the fact that the 

 radius of the hind wings has two sectors. Thisisalso the case in the wings 



Fig. 179. — -Wings of Dilar nohircc. 



of Rexavius japonicns. In none of the HcmcrobiidcE is there more than one 

 radial sector in the hind wings. 



The following remarkable series of variations in the structure of the 

 radial sector exists in the Dilaridse. 



In Dilar americanus, as described by McLachlan, there is a single five- 

 branched radial sector in both fore and hind wings. 



In Dilar turcius, as figured by Handlirsch ('06), the radius of the fore 

 wings bears two sectors, the second of which is five-branched. The radius 

 of the hind wings bears a single five-branched sector. 



In a species of Dilar figured by Brongniart ('93), the radius of the fore 

 wings bears three sectors; the third sector is six-branched, making eight 

 branches in all. The radius of the hind wings bears a single seven-branched 

 sector. 



