628 ASILID^ 



9 (10) Abdomen always conical and much longer than the wings. 



Upper branch of the cubital fork often with a peculiar recurrent 

 bend or even with the rudiment of a recurrent veinlet. Face-knob 

 strong. Ovipositor with a conspicuous circlet of spines. 



A large genus of mainly American flies of which three species may 

 occur in Asia and one in South Russia unless these belong to a genus 

 intermediate between Proctacanthus and Polysarca. 



Proctacantiius. 



1 (9) Abdomen shorter than (or only as long as) the wings, bare, short, 



and plump. 



Veins incomj^lete towards the hindmargin. Ovipositor without 

 any consi)icuous circlet of spines. 



Russian or Transcaspian species only. 



Polysarca. 



11 (8) Lower branch of the cubital fork straight, undulating (fig. 353), 



or bent downwards (tig. 350), but always ending after the 

 wing-tip (except in Eccoptopus). 



12 (13) Upper branch of the cubital fork with a short recurrent veinlet 



(fig. 350).^ 



First posterior ceU usually closed or very much narrowed. 



Fig. 350. — Apoclea femoralis (after van der Wulp). 



though sometimes wide open. Face-knob inconsiderable. Ocelli 

 absent. 



About a dozen Pal^arctic species, none of which are known to occur 

 in Europe. 



Apoclea. 



13 (12) Upper branch of the cubital fork without any trace of a recurrent 



veinlet, and without even an unusual bending at the spot where 

 such a veinlet might occur (fig. 353). 



14 (15) Middle femora very much thickened; middle tibiae serrulate 



beneath on the apical third and ending in a short blunt thorn. 



Style rather short and tliick, but with its first joint longer 



than the short second. 



_ Small cross-vein long and sloping. A single very distinct species, 

 which occurs from Greece to Rhodes. 



POLYPHONIUS. 



15 (14) Middle femora not unusually thickened; middle tibiae without 



a terminal thorn. Style thin, with its first joint usually 

 rudimentary and always shorter than the second. 



