EPHYDRID.^. 



309 



27. Clypeus prominent. ........ 28 



Clypeus hidden. ...... . . 29 



28. The costal vein reaches to the third longitudinal vein (19, 2O) . 



Brachydeutera. 

 The costal vein reaches to the tip of the fourth vein (24, 29) . 



Parydra. 



29. Claws almost straight; pulvilli indistinct (5). 

 Claws curved; pulvilli distinct. 



30. Oral border quite bare (33,34). 



Oral border bristly. ..... 



31. Arista pubescent (32). .... 

 Arista pectinated. ...... 



Ephydra. 

 30 



Ilythea. 



3i 



. Scatella. 

 Ceenia. 



Ochthera huinilis, enlarged. 



29 



