212 EXOTIC NEUROPTERA. 



10. In hind-wing two rows of cells between cubitus and hind margin. 



Nyiiiphes. 



In hind-wing but one row of cells between cubitus and hind 



margin Nesydrion. 



11. Basal costal space narrow, thecostals mostly simple, median forked 



toward base 12. 



Basal costal space very broad, the costals mostly forked; basal 

 joint of tarsi very short, not longer than second 13. 



12. Basal tarsal joint not longer than the second Osmylops. 



Basal tarsal joint much longer than the second joint. 



Spilosniylus. 

 13. — In the fore-wings the median vein is forked near the base ; one 

 basal subcostal cross-vein ; in hind wings a branch of the 

 anal vein runs parallel to the cubitus for a short distance. 



Nyiiipliydriou. 



In the fore-wings the median vein is not forked near base ; several 



subcostal cross-veins Myiodactyliis. 



14. Median vein of fore-wings forked near base 15. 



Median vein of fore-wings not forked till much beyond the middle, 



the empodia forked 17. 



15. Fore-wings with outer margin plainly excised ; ocelli present ; 



empodia forked Kempynus. 



Fore-wings not plainly excised on outer margin 16. 



16. No ocelli ; empodia forked ; wings slender Osiiiyliuiis. 



Ocelli present ; empodia entire Osiuylus. 



17. Fore-wings with many subcostal veins ; the cubitus and its fork 



strongly curved toward the tip Porisiims. 



Fore-wings with only a basal subcostal cross-vein ; the cubitus and 

 its fork but slightly, if any, curved near tip 18. 



18. Median vein of hind-wings not forked near base ; antennae very 



long; fore-wings rather slender Guinilla. 



Median vein of hind-wings forked near base 20. 



19. Four or five branches to the radial sector Berotha. 



Eight branches to the radial sector Isocelipteron. 



20. The median vein of fore-wings forks just above where the branches 



of cubitus turn down to go to the margin ; the upper cubi- 

 tus not there forked Austrosiuyliis. 



The median vein of fore-wing is not forked till further out, while 

 the upper branch of the cubitus is forked at the turn. 



Steiiosinyliis. 



NYMPHYDRION n. gen. 



Wings very densely veined, and entire middle areas filled 



with cross-veins. Costal area of fore-wings very broad, the 



costals mostly forked, no recurrent vein ; in hind-wings the 



cubitus has no fork running parallel to it, but there is a 



