EMPIDIDvE. 75 



6. Antennae very short, apparently two-jointed, the third joint compressed, 



with a short, thick, unjointed style. . HORMOPEZA Zetterstedt. 



Antennae not very short, distinctly three-jointed ; third joint awl or 



pear shaped or spherical, with a two-jointed terminal style or 



bristle. ./.... 7 



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



ened in the $. . ..... . . . HILARA Meigen. 



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



$ not thickened GLOSIA Meigen. 



TACHYDROMIN^;. 



1. Third longitudinal vein furcate; discal cell present; anterior coxae much 



elongate 2 



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



2. Front femora much thickened ; two posterior veins arise from the discal 



cell. ~~ HEMERODROMIA Meigen. 



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

 discal cell. . 3 



3. Antenna? with a long terminal bristle. . . ARDOPTERA Mac-quart. 

 Antennae with a short terminal bristle or style 4 



4. Sixth vein obsolete before reaching the margin. CLINOCERA Meigen. 

 Sixth vein not obsolete before reaching the margin ; antennae with a 



very short terminal style. . . . SYNAMPHOTERA Loew. 



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



with a long terminal bristle. . . . TACHYDROMIA Meigen. 

 Anal cell wholly wanting 6 



6. Front femora thickened. ........ 7 



Front femora not thickened. '. . . . . . . 8 



7. Arista terminal TACHYPEZA Meigen. 



Arista subdorsal PRONECTISCA Loew. 



8. Arista terminal . . DRAPETIS Meigen. 



Arista dorsal. .......... 9 



9. Proboscis short, vertical ; palpi broad STILPON Loew. 



Proboscis slender; palpi narrow, slender. . PHONEUTISCA Loew. 



