Empididae. 317 



arista. Thorax black, shining; the uniserial dorsocentral and biserial 

 acrostichal hairs somewhat distinct; there are about two a little longer 

 dorsocentral brislles behind, and two notopleural bristles; all the 

 hairs and bristles are yellow. Scutellum with two yellow marginal 

 bristles, and on each side a somewhat long hair. Pleura somewhat 

 greyish pruinose, sternopleura black, shining. Abdomen black, shining, 

 with a little longish, yellow hairs. Venter black, sometimes a little 

 pale at the base. The exterior genitalia large and much swoUen, 

 forming a large knob on account of the ventral plate being large and 

 arched, it is short-haired with blackish hairs. Legs yellow or reddish 

 yellow, the posterior feniora often a little brownish; the last tarsal 

 joint black. The front feraora not and the middle femora almost not 

 thickened; the apical spine on the middle tibiæ so short and stubby, 

 that it is almost wanting. The legs are yellow haired; there are no 

 long bristles on the postero-ventral side of the middle femora, but 

 the spines in the row here are long and bristle-like in the basal part; 

 the apical half of the middle tibiæ is generally a little darkened, and 

 it is clothed with a very short and dense, greyish yellow pubescence. 

 Wings hyaline, slightly greyish or yellowish. Veins blackish. Balteres 

 pale yellow. 



Female. Similar to the male; abdomen pointed, ovipositor (eighth 

 segment) very long. 



Length 2,5—3,5 mm. (the latter size taken from the female, the 

 ovipositor included). 



This species is at once recognised by the large male genitalia, 

 the long female ovipositor, and in both sexes by the curious pubescence 

 on the apical half of the middle tibiæ. 



T. ciliaris is not uncommon in Denmark; Ordrup Mose, Erme- 

 lund. Bøllemosen; on B'unen at Veflinge and in Jutland at Hald near 

 Viborg and at Sæby; my dates are ^''/e— ^^'/s. It occurs like the pre- 

 ceding in woods on bushes and in low herbage on humid and some- 

 what shaded piaces, and it is a somewhat late occurring species. 



Geographical distribution : — Northern and middle Europe down 

 into Styria; towards the north to middle Sweden, and in Finland. 



28. T. thoracica n. sp. 

 Of this species I have only the female. Frons and vertex grey; 

 epistoma white; palpi yellow, large, slightly shorter than the black 

 proboscis. Occiput grey, upwards yellowish pruinose, with yellow 

 hairs above, white hairs below. Antennæ yellow, arista brown; the 

 third joint short, about half as long as the arista. Thorax black, 

 .shining, the margin yellow pruinose, the pruinosity continued in- 



