Asilidae. 41 



others. Clypeus is distinct and broad, occupying the whole breadth 

 of the epistonia, rounded upwards. I have only been able to examine 

 the mouth paris in situ with a lens, but they are in all probabiiity in 

 the main iike those in the neaiiy related Lasiopoyon ; the proboscis 

 is short and thick, truncate at the apex and directed obhquely down 

 and forwards. Thorax is rectangular, high and somewhat arched 

 above. There are præsutural and postaiar bristles whereas the supra- 

 alar bristles are only slightly indicated among the conimon hairs. The 

 scutellum has no bristles but the hairs at the apex are long and 

 somewhat strong; the metapleura have long hairs; hypopleura without 

 long hairs. Metathorax small with a short metasternum, the space 

 between it and the hind coxæ membranous. Abdomen consists of 

 eight segments; the first dorsal segment is short, the second the 

 longest; on the ventral side the first segment is likewise very short; 

 the eighth segment is small and quite hidden. The genitalia I have only 

 examined in situ; the male genitalia resemble somewhat those in 

 Lasiopogon but show some differences ; there is an upper pair of forceps 

 with thick, not hook-formed and nearly parallel arms between the apex 

 of which there is a paired median dorsal lamella ; below there is a 

 low^er pair of forceps the arms of which are, as usual, complicated and 

 two-branched, they are thick at the base, and the outer or lower 

 branch has a pointed apical part, reaching to the end of the upper for- 

 ceps ; at the base of the lower forceps there is a rounded median, ventral 

 lamella. The female genitalia likewise resemble those in Lasiopogon; 

 there is a dorsal piece, beset with spines, but the ovipositor formed 

 of the eighth ventral segment is very small and indistinct. The legs 

 are somewhat strong, especially the hind legs; the metatarsi are some- 

 what elongated ; in some (non-Danish) species the front tarsi of the 

 males are very elongated. The femora have long hairs on the ventral, 

 and partly also on the posterior side. The tibiæ have some strong 

 bristles on the dorsal and anterior sides, the front tibiæ on the 

 posterior side; besides some long, thin bristles chiefly on the ventral 

 side. All tibiæ have apical spurs. The tarsi have long bristles at 

 the end of the joints. The front tibiæ have a dense pubescence on 

 the ventral side at the apex, and the hind tibiæ have a very dense 

 and rather long pubescence on the ventral and posterior sides nearly 

 produced to the base and almost forming a fringe; the tarsi are 

 densely pubescent below. There are two pulvilli and a short, bristle- 

 shaped empodium. Wings with the subcostal cell open, the cubital 

 vein forked; between the discai cell and the upper branch of the 

 postical vein a postical cross-vein; five posterior cells, the fourtli nar- 



