Empididae. 123 



on the dorsal side towards the apex; the front tibiæ with some 

 bristles on the dorsal side and for the rest with a short, dense, 

 reddish or brownish pubescence, longest on the posterior side; middle 

 tibiæ with some bristles above, and short, somewhat strong hairs 

 below, besides with a very short pubescence on the anterior side; 

 the hind tibiæ have likewise some bristles above and also shorter 

 hairs, and a ciliation below, which is specially dense towards the 

 apex; the hind metatarsi are spiniilous beneath and have some bristles 

 above, and all tarsi have short bristles at the apex of the joints; the 

 pubescence and ciliation on the tibiæ is continued out on the tarsi. 

 The hairs and bristles are black or brownish black, only below the 

 front femora yellowish ; the hairs on the coxæ yellow. Wings a little 

 brownish tinged, Veins brown, the lower branch of the cubital fork 

 bending downwards, terminating about at the apex of the wing. 

 Stigma brown. Halteres blackish, the peduncle brownish. 



Female. Frons broad, grey. Thorax more grey than in the male 

 and the two interstitia more conspicuous. Abdomen greyish pruinose, 

 the hairs somewhat shorter than in the male; the lamellæ of the 

 ovipositor somewhat long. The front femora slightly pennate above 

 towards the base; the posterior femora pennate above and below, 

 the middle femora below only on the apical half; the front tibiæ 

 pennate above, but the hairs only slightly broadened, middle tibiæ 

 ciliated and with a few thin bristles above, hind tibiæ pennate below, 

 the hairs only slightly broadened and passing into cilia towards the 

 apex; above they are ciliated and with a row of bristles. 



Length 5 — 5,7 mm. 



E.serotina is rare in Denmark, only seven specimens are known; 

 Tyvekrog (the author) ; in Jutland at Holstebro (Jacobsen, Zetterstedt's 

 type-specimens), at Gjerlev near Randers Fjord (H. J. Hansen) and at 

 Rebild near Skjørping (J. P. Kryger). It seems to be a late occurring 

 species, my dates are from the last part of July to ^/9; Loew records 

 September for the species. 



Geographical distribution : — Middle Europe down into Styria ; its 

 northern limit lies in Denmark. 



Remarks: I am quite sure, that this species, of which I have 

 examined Zetterstedt's type-specimens, is identical with serotina Loew, 

 as the description by Loew agrees in every character; his description 

 of the colour of thorax, the yellow hairs at the sides, the colour and 

 hairs of abdomen, the structure of the genitalia and the structure and 

 hairiness of the legs, agrees in every respect. — As the E. obscura Macq. 

 will scarcely ever be recognised again, I use the name serotina Loew 

 for the present species, which is tims identical with obscnra Zett. 



