m 



The valvao with lateral hooked projections, show 

 dilutata and christyi, which can again be separated, 

 by brushing the eighth sternite to expose the octavals. If 

 these lie close together, the specimen is christyi; if apart, 

 dilutata. The valvae without lateral hooked projections 

 show filigrammaria and autumnata; those with a deep 

 excavation between the octavals being filigrammaria. 



In mounted specimens, the less numerous cristse hairs 

 will also clearly separate the latter species from autumnata. 



Oporinia dilutata, Bork. 20 8 



Yalva peaked, hooked on outer margin; costa thickened. 

 Labides head not wide. Uncus broad, tapered; pads hairy. 

 /Edoaagus long, curved, dentate above. Vesica scobinate. 

 Cristas of about seven hairs. Saccus pointed. Octavals 

 wide apart. 



Ovipositor long, retractile. Ostium encircled. Signa 

 two, discoid, scobinate. 



In the figure of this species, the ductus seminalis has 

 been added. 



Christyi, Prout. 125 



Yalva shorter than dilutata, hook more curved. Labides 

 head wide. Octavals close together. 



Signa two, small. 



Filigrammaria, //.-S. 186 



Valva peaked, sharp angle on outer margin in place of 

 hook. Labides head not wide. Uncus broad, tapered. 

 /Edoeagus short, dentate above. Cristse of about seven 

 hairs. Saccus pointed. Octavals strong, divided by a deep 

 excavation. 



Ovipositor fairly long, retractile. Ostium encircled. 

 Signa two, discoid, scobinate. 



Autumnata, G. 124 



Labides head wide. Cristae of about nineteen hairs, and 

 several at the base. Octavals smaller than filigrammaria , 

 excavation not deep. 



Signa two, distinctly smaller. 



