254 Transactions. — Zoology. 



Summary of the Genera at present known in New Zealand. 



SECTION I. 

 Sub-section I. Diadocidinji;. 

 Sub-section II. Mycetobin^. 



Anterior branch of the second longitudinal vein large, end- 

 ing in the costa, and forming with the second longitudinal a 

 fork having its base at or beyond the marginal cross - vein. 

 Anterior branch of the fourth longitudinal vein and the third 

 longitudinal vein issuing from the second longitudinal vein. 

 Fifth longitudinal vein perfect. Inner marginal cell large. 

 Surface of the wing hairy, or only microscopically pubescent. 



Genus Nervijuncta, gen. nov. 



Anterior branch of the second longitudinal vein and the 

 second longitudinal vein forming a fork having its base beyond 

 the marginal cross-vein ; base of the fork lying just before 

 the base of the third submarginal cell. Surface of the wing 

 hairy. Third longitudinal vein arising from the second longi- 

 tudinal vein beyond the apex of the inner marginal cell. 



This genus is closely allied to Ditcmyia, but differs from it 

 in the third longitudinal vein arising beyond the apex of the 

 inner marginal cell. 



Genus Gyrtoneura, gen. nov. 



Auxiliary vein long, complete. Anterior brancli of second 

 longitudinal very long. Fork formed by branches of second 

 longitudinal with its apex lying behind the apex of the fork of 

 the third longitudinal vein. Both branches of second longitu- 

 dinal vein highly arcuated. Surface of wings slightly hairy. 



This genus is very different from any previously described. 

 It should probably occupy the first place in the sulD-section. 



Genus Huttonia, gen. nov. 



Auxiliary vein absent. Fork formed by the branches of 

 the second longitudinal vein, long. Anterior branch of third 

 longitudinal represented by a rudiment extending a short dis- 

 tance into the disc from the posterior margin. Posterior 

 branch of third longitudinal also disconnected, but longer than 

 the anterior branch. Anterior branch of fourth longitudinal 

 also disconnected, but longer than the others. 



This genus is also very distinct from any previously de- 

 scribed. It should occupy the last place in the sub-section. 



Sub-section III. Bolitophilin^. 

 Genus Bolitophila, Meig. 



Anterior branch of second longitudinal vein short, lying 

 almost vertically to the costa or to the first longitudinal vein 

 (occasionally absent), and forming with the second lougitu- 



