xviii SHORT ACCOUNT OF THE MORE IMPORTANT 



Family EpJiydriJcc. 



Face very convex, covered with hairs and bristles, but no vibrissa;. 

 Clypeus large. Proboscis incrassated with a swollen chin. Neura- 

 tion incomplete. Auxiliary vein distinct only at its base. Anterior 

 basal cell united to discal cell. 



Family Drosothilidce. 



No bristles along costa. First longitudinal vein very much cur- 

 tailed ; auxiliary rudimentary. Front bristly above. Small vibrissa 

 at border of mouth. A distinct sub-antennal furrow. Antenna with 

 third joint long, terminal bristle pectinate or pubescent. 



Family Cliloropidce. 



No bristles along costa. No auxiliary vein. Anterior small basal 

 cell united to discal, the posterior one wanting. Bristles only on 

 the crown. Border of mouth with no vibrissa, but sometimes a 

 single hair. 



Family Agromyzidce. 



No costal bristles. First longitudinal vein short, the auxiliary 

 connected with it at tip ; posterior transverse vein far distant from 

 the border. Front with strong bristles. Border of mouth with 

 vibrissa on each side. Third joint of antenna; rounded, terminal 

 bristle bare or pubescent. 



Family Phyiomyzidce. 

 No bristles along costa. Veining much as in above, but no 

 posterior transverse vein. 



Family Asiiadce. 



No bristle along costa. First and second longitudinal vein short. 

 The two posterior basal cells, as well as the transverse vein, wanting. 



Family B arbor idcc. 



Neuration incomplete, only the commencement of the auxiliary 

 vein being seen. Thorax, scutellum, and abdomen flat. Front 

 bristly. Face excavated, with a vibrissa on each side of border of 

 mouth. 



Family Phorid(e. 



Wings with several stout veins running along the costa, and three 

 or four weak ones which run across surface of wings and not com- 

 pletely connected with hindmost of the stout veins from which they 

 seem to issue. Antenna; apparently only single-jointed, with long 

 bristle. 



