FAMILY MYCETOPHILID.T: THE FUNGUS GNATS 123 



IG. Ocelli two, approximated; wings without macrotrichia (hairs) on mem- 

 brane; auxiliary vein reaching at least the base of the thiixl vein; fine 



tibial sets in regular longitudinal rows 19 



Ocelli three, if but two (in Eudicrana) they are close to the eye margin. 17 



17. Wing with macrotrichia (hairs) on membrane 20 



Wing without macrotrichia on membrane 18 



18. Apical segment of first vein several times longer than the anterior 



crossvein; branches of fourth vein longer than the petiole 32 



Apical segment of first vein short, in most cases not much longer than 

 the crossvein, or if longer the branches of fourth vein scarcely 

 longer than the petiole 38 



19. Costa not produced beyond tip of third vein; no spurious vein between 



third and fourth veins; wing not banded (23) Mycomya Rondani 



Costa produced beyond tip of third vein; spurious vein usually present 

 between third and fourth veins; wing banded or spotted (11). 



Neoempheria Osten Sacken 



20. Ocelli two, contiguous to eye margin Eudicrana Lcew 



Ocelli three, remote from compound eyes 21 



21. Fork of fifth vein situated nearer to wing base than is the fork of 



fourth vein 22 



Fork of fifth vein, if present, situated beyond fork of fourth vein.... 27 



22. Postnotum with hairs or bristles 23 



Postnotum bare 26 



23. Anterior branch of fourth vein complete or nearly so 24 



Anterior branch of fouith vein faint or defective at base; third vein 



undulate (Odontopoda). (24) Neuratelia Rondani 



24. Subcostal crossvein before middle of auxiliary vein (25). . Allocotocera Mik 

 Subcostal crossvein beyond middle of auxiliaiy vein 25 



25. Third vein straight; costa not produced beyond its tip (Diomonus) (2G). 



Leptomorphus Curtis 

 Third vein undulate; costa produced beyond its tip (27). 



Polylepta Winnertx 



26. Metapleura hairy; auxiliary vein ending in first vein; body stout (28). 



Syntemna Winnertz 

 Metapleura bare; auxiliary vein ending in the costa; body long and 

 slender (29) Paratinia Mik 



27. Legs slender and extremely long; basal tarsal segment of anterior 



legs twice as long as the tibia; fourth vein forks broadly (12). 



Phthinia Winnertz 

 Legs normal; fork of media pointed 28 



28. Second branch of fourth vein complete 29 



Second branch of fourth vein detached, present only as a short element 



on the wing margin (30 ) Azana Walker 



