Empididae. 99 



(In the single Danish species they are slightly pennate). Wings with 

 the discai cell pointed, the cubital vein terminating a little before the 

 apex; anal vein reaching the margin. Alula small; axillary lobe 

 large, the axillary angle acute. 



One Danish species 8. grisea. 



8. E. grisea Fall. 



1815. Fall. Dipt. Suec. Empid. 22, 12. — 1842. Zett. Dipt. Scand. I, 

 373, 6 et 1859. XIII, 5007, 6. — 1862. Schin. F. A. I, 108. - 1903. 

 Kat. palåarkt. Dipt. II, 237. 



Male. Eyes separated, frons grey, with an impressed middle 

 line and some black hairs; epistoma grey below the antennæ, more 

 downwards black, shining. Occiput grey, with dense and long, black 

 hairs, below with brownish yellow hairs. Labrum ferruginous or 

 brownish; palpi yellow. Antennæ somewhat short, black, the basal 

 joints sometimes brownish or reddish_, with short hairs; the third 

 joint slightly excised below. Thorax grey, slightly shining, with three 

 very faint, brownish stripes. The dorsocentral bristles short in front 

 and here biserial, long and uniserial behind; acrostichal bristles short, 

 biserial; all black. Fmiher there are many humeral bristles, some 

 posthumeral, notopleural and supraalar and one postalar bristle, all 

 black; the bristles are somewhat indistinct between the other hairs 

 present, thus the præsutural depression has many, rather strong hairs, 

 but generally two strong bristles. Scutellum with four strong, black 

 marginal bristles. Pleura grey, metapleura with black or somewhat 

 brownish bristles; propleura with brownish or yellowish hairs; pro- 

 thoracic spiracles yellow. Abdomen somewhat flat, a httle varying 

 in colour, greyish black or sometimes more brownish, shining; venter 

 similarly coloured. Abdomen somewhat 

 densely clothed with yellow hairs which 

 are longest in front, and here there are 

 some dark hairs intermingled at the sides. 

 Exterior genitalia large and curious, blackish 

 or lighter; the lower lamellæ narrow but 

 long, densely haired with long, brownish 

 hairs on the lower side; the upper lamellæ 

 with two teeth on each side, a basal, Fig. 34. E. grisea, 



somewhat styliform, backwards curved, male genitalia. 



and an apical, somewhat triangular; the 



lamellæ are hairy at the margin. The last ventral segment is arched, 

 and from here the long, sinuous, yellow or brown penis issues; it is 



7* 



