EMriDID.V,. To 



G. Antciiiiffi very short, apparently tvvo-jointt'd, the tliird joint compressed, 



witli a short, tliick, unjointed style. . IIokmopeza Zetterstedt. 



Antenna^ not very sliort, distinctly three-jointed; third joint awl or 



pear shaped or si)herical, with a two-jointed terminal style or 



hristle 7 



7. Prohoscis as long as the head, vertical ; anterior metatarsi usually thick- 



ened in the $ Hilara Meigen. 



8. Prohoscis shorter than the head, horizontal; anterior metatarsi of the 



$ not thickened Gi.oma Meigen. 



T A C H Y D KO M I N^.. 



Third longitudinal vein furcate; discal cell present; anterior coxaj much 

 elongate. ..... ..... '2 



Tliird longitudinal vein simple; discal cell wanting. ... 5 



Proiit femora nmch thickened ; two posterior veins arise from the discal 

 cell. . . . . ". . . Hemerodromia Meigen. 



Front femora not much thickened ; three posterior veins arise from the 

 discal cell. ...........•' 



Antennaa with a long terminal hristle. . . Ardoptera Macquart. 

 Antennae with a short terminal hristle or style. .... 4 



Si.\th vein obsolete before reaching the margin. Clinocera Meigen. 



Sixth vein not obsolete before reaching the margin ; antenna? with a 



very short terminal style. . . . Synamphotera Loew. 



Anal cell, or at least the posterior basal cross-vein, present; antenna? 



with a long terminal bristle. . . . Tachvdromia Meigen. 



Anal cell wholly wanting. 



Front femora thickened. 

 PVont femora not thickened. 



Arista terminal. ..... 



Arista subdorsal. ..... 



Arista terminal. ..... 



Arista dorsal. ..... 



Proboscis short, vertical ; palpi broad. . 

 Proboscis slender; palpi narrow, slender. 



7 

 8 



Tachypeza Meigen. 

 l*«ONEUTisCA Loew. 



Duapetis Meigen. 

 !> 



. Stilpon Loew. 

 PiioNEiTiscA Loew. 



