710 



ASILID.E 



case the genus may be not Palaearctic, and those species from the 

 PalEearctic region which have been included in it may be relegated to 

 a section of Stenopogon. 



16 (13) Metapleurae conspicuously pubescent or bristly. 



17 (26) First posterior cell closed (fig. 378) or very much contracted. 



Fig. 378.— TricKs olivaceus ? . x 9. 



Face broad, without any prominent knob or bristly face-beard. 

 Nc obvious dorsal bristles on the thorax or scuteUum except some 

 rather indistinct praesutural, supra-alar, and postalar ; metapleural 

 fan strongly developed. Alul^ large. 



18 (25) Claws and pulvilli normal {covf. fig. 382). 



Fourth posterior cell bluntly closed. 



19 (24) Hind femora not spinose beneath. 



20 (21) Marginal cell fairly wide open. 



Eadial vein more or less curved up- 

 wards. ScuteUum without marginal bristles. 

 Style blunt. 



N.B. 1. — It is often difficult to deter- 

 mine where the subcostal vein ends. 



FiQ. 379. — Perasis sareptana £. (After Hermann.) 



Fig. 380. — Perasis sareptana <J . 

 (After Hermann.) 



JV.B. 2. — Several more genera could be formed out of Triclis, if the 

 antennal characters given as distinctive of the two next genera be con- 

 sidered of generic value. 



Tkiclis. 



21 (20) Marginal cell closed or only very slightly open (fig. 379). 



Eadial vein rather abruptly curved upwards. Style with a short 

 bristle at its end. 



22 (23) ScuteUum with two strong marginal bristles. 



Style bent outwards, two-jointed, with a fine bristly tip; basal 

 antennal joint with an evident knob on the underside (fig. 380). 



Perasis. 



