Empididae. 213 



undivided arista, which is not articulated to the joint. Proboscis short, 

 at most about as long as the head is high; maxillæ present or ab- 

 sent; the maxihary palpi one-jointed or indistinctly two-jointed. Meta- 

 pleura with a few bristles, or with shorter hairs, or finally bare. 

 Legs with the front coxæ more or less elongated, the front femora 

 often thiciiened, and the front legs raptorial and specially armed. 

 Wings with the cubital vein forked, or (Chelipoda, Phyllodromia) 

 unforked; diseal vein forked, four posterior cells; a discai cell present, 

 sending three veins to the margin, or only two veins and then the 

 upper is branched; or a discai cell not present. The basal cells of 

 about equal length, or the second either shorter or longer than the 

 first ; the anal cell present and as long as or shorter than the second 

 basal cell, or the anal cell wanting; anal vein shorter or longer, or 

 quite wanting; the lower branch of the postical vein recurrent, or 

 meeting the anal vein at a right angle, or quite absent. Axillary 

 lobe small or frequently wanting. No alula. Stigma present or 

 absent. 



Tahle of Genera. 



1. Cubital vein forked 2. 



— Cubital vein unforked 6. 



2. Discai cell absent, or when present sending two veins 



to the wing-margin, the upper branched i. e. the se- v 



cond posterior cell pedunculated; front coxæ much 



elongated, almost as long as the femora, these latter 



considerably thickened 15. Hemerodromia. 



— Discai cell present, sending three veins to the wing- 

 margin ; front coxæ not much elongated, not more 

 than half as long as femora , these latter not or 

 slightly thickened 3. 



3. The upper branch of the cubital vein connected (nor- 

 mally) with the radial vein by a cross-vein 4. 



— The upper branch of the cubital vein not connected 



with the radial vein 5. 



4. Wings hyaline 14. Synamphotera. 



— Wings brown, with hyaline spots • 16. Dolichocephala. 



5. Antennæ five-jointed, third joint somewhat short; pro- 

 boscis thick, shorter than the head is high 13. Clinocera. 



— Antennæ three-jointed, long, third joint band-shaped, 

 terminating in a long arista, not articulated to the 



joint; proboscis thin, as long as the head is high. 17. Trichopeza. 



6. No discai cell 18, Chelipoda. 



— A discai cell present 19. Phyllodromia. 



13. Clinocepa Meig. 



Species of small to medium size (to about 8 mm), and of slender 

 shape; the colour is brown or grey, very often olive-brown above. 



