664 LIST OF DIPTEEA. 



The species of this group are distinguished from those of 

 Eutolmus by the distinct prominent almost style-shaped lamella? 

 on the end of the pointed ovipositor of the female, which it has in 

 common with the species of all the following groups of the first 

 principal division ; from these last it is distinguished by the distinct 

 widening and by the edge tip-like lengthening of the under hind 

 border of the eighth abdominal segment of the male. The species 

 are of black-gray or of brown-gray colour, of large or of middle size. 

 The legs are more or less stout, the femora are more or less thick- 

 ened, the anterior are marked by their more or less long and thick 

 hairs. The legs are generally black ; the tibiae are red, the fore 

 femora are mostly without spines beneath. The face is broad. The 

 sexual parts of the male are shining black in all the species ; of 

 middle size, not compressed nor enlarged ; the forceps are simple in 

 most species. The ovipositor has in all the species a triangular tip, 

 in some it is sabre-shaped, in most it is somewhat straight, but in 

 none has it a linear figure. Most of these characters are modified 

 in some of the species. 



Div. I. 



Mas. Abdominis segmentum Sum subtus in mucronem productum. 



The under border of the eighth abdominal segment of the 

 male lengthened into an edge, or with a tufted and fringe-like 

 clothing, which has the appearance of an edge. 



Subdiv. I. 

 Mas. et feem. Femora antica subtus setosa. 



23. ASILL'S CEIBRATUS. 



Obscure cinereus ; mystax albus ; pedes nigri, femoribus tibiisque 

 longitudinaliter piceo striatis ; alee limpidce venis ferrugineis, 

 apice margineque postieo subcinereis venis obscurioribus. 

 Mas. — Forceps analis margine posteriore profunde exciso. 

 Foem. — Oviductus longus, aculus, basi minus compressus. 



Asilus cribratus, Loew, Linn. Ent. iv. 3, 23. 



Sicily. 



Subdiv. II. 

 Femora antica maris inermia,/cewi. subtus setosa. 



