Therevidae. 155 



black, the first segment more or less grey, the second to fourth with 

 triangular, grey or silverwhite lateral spots, the fifth and sixth seg- 

 ment with more transverse spots rounded inward, the seventh quite 

 shining black; the first four segments with depressed hairs which are 

 black at the black parts, white on the spots, the last three segments 

 with short, erect, black hairs. Venter with the ,first four segments 

 blackish grey, slightly pruinose, with short, pale hairs, the last three 

 segments shining black, with short, erect, black hairs; the segments 

 with yellow hind margins. Femora with the tips more broadly yel- 

 low than in the male. 



Length 11 — 12 mm. 



T. fuscipetmis is very rare in Denmark, only one specimen, a 

 female, is known, taken at Horsens (O. G. Jensen). 



Geographical distribution: — Middle Europe; its northern limit 

 is in Denmark; it seems everywhere to be a rare species, and it is 

 probably a mountain species. 



Scenopinidae. 



Head as broad as thorax, broader than high. Eyes touching or 

 separated in the male, separated in the female. In the male the 

 facets in the upper part sometimes larger than below. Three ocelli 

 present. Jowls small, not descending below the eyes. Antennæ in- 

 serted near to each other, below the middle, somewhat pendulous; 

 they are three-jointed, the first two joints small, the third somewhat 

 elongated without any style. Epistoma short, retreating, almost hori- 

 zontal. No oral cone developed; clypeus somewhat horseshoe-shaped, 

 lying horizontally. Proboscis short; the mouth parts consisting of a 

 triangular labrum, thin, pointed maxillæ with a somewhat long, one- 

 jointed palpus, a weak hypopharynx and a labium with a short basal 

 part and rather large labella. Thorax rectangular, longer than broad, 

 somewhat arched. No macrochætæ present. Metapleura bare. Ab- 

 domen flat above, with more or less parallel sides, consisting of seven 

 segments. Legs somewhat strong, without bristles but with small 

 apical spurs on all tibiæ. Two pulvilli bot no empodium. Wings 

 with the costa only reaching to the apex; the cubital vein forked, 

 two cubital cells; the discai vein not branched and hence no genuine 

 discai cell, but this formed below in its whole length by the upper 

 branch of the postical vein; only three posterior cells, tliat is the 

 second and third are united, lying outwards to the discai cell, the 

 fourth being confluent with the discai cell: the first posterior cell nar- 



