258 Transactions. — Zoology. 



Fifth longitudinal vein complete, joined beyond half its length 

 by a vein probably corresponding to the posterior branch of 

 the fourth longitudinal vein. 



I have only one species of this genus. 



Genus Paradoxa, nov. gen. 



Auxiliary vein represented by a rudiment. Costa ending 

 some distance before apex of the wing. First longitudinal vein 

 ending in the costa about half-way along the wing. Second 

 longitudinal ending in the costa some distance before its end. 

 Third longitudinal vein with rather short petiole and long 

 fork ; posterior branch slightly detached at its base. Fourth 

 longitudinal not forked. Fifth longitudinal as in Cijcloneura. 



I have only one species of this genus. 



B. Three ocelli, one on the inner border of each of the compound 

 eyes, the third one situated in the middle of the anterior 

 border of the front. 



Subcostal cross-vein missing. Surface of the wing micro- 

 scopically pubescent. Abdomen of the male with six 

 segments. 



Genus Zygomyia, "Winn. 



Tips of the costal and second longitudinal veins uniting far 

 before the apex of the wing. Auxiliary vein incomplete, bent 

 anteriorly, gradually disappearing or only forming a tooth. 

 Apex of the inner marginal cell not situated beyond the base 

 of the second submarginal cell. Petiole of the fork of the 

 third longitudinal very short. Anterior branch of the fourth 

 longitudinal vein wanting. Fifth longitudinal vein incomplete. 

 Sixth longitudinal vein in most cases longer. 



I have two species belonging to this genus. 



C. Two ocelli, one on the inner border of each of the compound 

 eyes. 



Surface of the wing microscopically pubescent. Costal vein 

 not extending beyond the tip of the second longitudinal 

 vein. Subcostal cross-vein missing. 



Genus Mycetophila, Meig. 



Auxiliary vein incomplete, bent anteriorly. Apex of the 

 inner marginal cell lying over the base of the second sub- 

 marginal cell. Branches of the fourth longitudinal fork 

 inclined towards one another at their tips. Fork of the third 

 longitudinal vein with a very short petiole, or almost sessile. 

 Base of the second posterior cell before, under, or a little 

 beyond the base of the second submarginal cell. Fifth longi- 

 tudinal vein incomplete, broken off before the base of the 

 second posterior cell, or disappearing. Abdomen of the male 

 with six segments. 



