262 Transactions. — Zoology. 



tudinal generally only rudimentary. Between the fourth and 

 fifth longitudinals there is generally a longitudinal fold ap- 

 pearing like a vein under and close to the fourth longitudinal 

 vein. Sixth longitudinal vein rudimentary or entirely miss- 



When the marginal cell is divided by an anterior branch 

 of the second longitudinal vein the cell thus formed is re- 

 garded as the first submarginal cell ; otherwise the cell be- 

 tween the second and third longitudinals is the first sub- 

 marginal cell. In some genera the cells are reduced to one 

 submarginal and one posterior cell. 



SQMMAEY OF GENEEA DESCEIBED IN THIS 



PAPEE. 



Sub-section Mycetobinjs. 

 Cyrtoneura, gen. nov. 

 Nervijuncta, gen. nov. 

 Htdtonia, gen. nov. 



Sub-section BoLiTOPHiLiNJi. 

 Bolitophila, Europe and America. 



Sub-section Macrocerin^.. 

 Macrocera, Europe, America, and Australia. 



Sub-section Ceroplatin^. 

 Ceroplafus, Europe, America, and Australia. 

 Platynra, Europe, America, and Australia. 



Sub-section Sciophilin^. 

 Sciopliila, Europe, America, and Australia. 

 Parvicellula, gen. nov. 

 Tetragoneura, Europe and America. 



Sub-section Mycetophilinji;. 

 Aneiira, gen. nov. 

 Euryccras, gen. nov. 

 Anoviala, gen. nov. 

 Paradoxa, gen. nov. 

 Cycloneura, gen. nov. 

 Aj^helomera, Australia. 

 Zygomyia, Europe. 

 Brackydicrania, Australia. 

 Mycetophila, Australia, Europe, and America. 

 Brevicornu, gen. nov. 



Cyrtoneura, gen. nov. 



Head oblong, broader than long, front not flattened. Eyes 

 large, oval, emarginate, meeting above the antennae. Ocelli 

 three, large, the central one being situated in front of the 



