Empididae. 241 



2. D. guttata Hal. 



1833. Hal. Entom. Mag. I, 161. (Leptosceles) . — 1903. Kat. palåarkt. 

 Dipt. II, 269. 



Male. Frons and vertex black, a narrow, V-shaped, grey line 

 stretches from the ocellar tubercle down the occiput, with the point 

 backwards; on each side of the tubercle, at the eye-margins, a whitish 

 shining spot is seen. Epistoma grey; palpi black. Occiput black, 

 with black bristles above, short, whitish hairs below. Antennæ black. 

 Thorax æneous black, shining, with a slight and indistinct whitish 

 middle line. Acrostichal bristles long, black. Further a humeral 

 bristle, a posthumeral, a notopleural and a postalar bristle, all black. 

 Scutellum with two black marginal bristles. Pleura blackish, a little 

 greyish pruinose. Abdomen æneous black, shining, very short-haired 

 with brownish hairs. Venter black. The genital forceps with two 

 long, thin, curved hooks. Legs yellowish; posterior coxæ greyish 

 pruinose, the knees, the apex of the tibiæ and the tarsi towards the 

 end brownish to blackish. The legs short-haired with brownish hairs. 

 Wings blackish grey or brown, with some (about eight) white spots, 

 of which four, one in the third cubital cell, two in the apical part of 

 the first posterior cell and one in the second posterior cell, are most 

 distinct, the others weaker and sometimes indistinct; the subcostal 

 and first cubital cells have no spots, thus there are none at the an- 

 terior margin; the first cubital cell is slightly Hghtened. Veins blackish, 

 the radial and cubital veins not undulated. No stigma. Halteres dark 

 yellowish to blackish. 



Female. Quite similar to the male with exception of the sexual 

 differences. 



Length 2 — 2,6 mm. 



Remarks: The halteres in this species seem to be able to vary 

 from yellow to blackish (var. nigrohalterata Strobl). 



D. guttata has only been taken quite recently, and only five spe- 

 cimens, three males and two females, in Geel Skov on ^'^h and ^^h 

 1909 (the author). It was taken in a small fen in the wood on Calla 

 palustris. 



Geographical distribution : — Europe down into Spain ; its northern 

 limit hes in Denmark. 



17. Trieliopeza Rond. 



Medium sized, dark coloured species of slender shape. The head 

 somewhat broader than long and a Uttle broader than thorax, only 

 slightly arched behind, and here with some bristles. Eyes large, 



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