122 Orthorrhapha brachycera. 



proved to be aestiva; it is thus hitherto not known north of Denmark, 

 since volucris in Siebke's Enum. Ins. Norv. 33, is probably also aestiva. 



20, E. serotina Loew. 



1867. Loew, Berl. ent. Zeitschr. XI, 48 et 55, 18. — 1903. Kat. 

 palåarkt. Dipt. II, 244. — Empis obscura: 1849. Zett. Dipt. Scand. VIII, 

 3026, 23. — 1903. Kat. palåarkt. Dipt. II, 241. — Empis ohscuripennis : 

 1893. Strobl, Mitth. Ver. Steierm. 1892, 66. 



Male. Eyes contiguous; the small frontal triangle and the epi- 

 stoma dark greyish. Eyes with the facets in ttie larger upper part 

 much larger than below, the difference between the two parts of the 

 eye very distinct. Oceiput grey with black, in the lower half with 

 yellow hairs. Labrum not twice as long as the head is high; palpi 

 somewhat long, blackish with brownish hairs. Antennæ not as long 

 as the head, black, the two first joints about of equal length, with 

 short hairs, the third elongated and much attenuated towards the 

 apex. Thorax greyish brown, the interstitia presenting themselves as 

 two stripes, and also the sides of the disc are darker, so that four 

 stripes may be seen; butwhen the thorax isviewed quite from behind, 

 or from in front with the hght from behind, there are three distinct, 

 dark stripes (with the bristles), abbreviated behind, The dorsocentral 

 and acrostichal bristles somewhat short, black, the former pluriserial, 

 strenger and uniserial behind; the latter biserial. Further a humeral 

 bristle, a posthumeral, three or four notopleural, a supraalar and a 

 postalar bristle, all black; besides there are some weaker, black hairs 

 at the sides of the disc and at the transverse furrow, and the humeri, 

 the posthumeral part and the anterior part of the præsutural de- 

 pression are clothed with yellowish hairs, Scutellum has four black 

 marginal bristles. Pleura brownish grey, metapleura with yellow 

 bristles, propleura with yellowish hairs. Abdomen black, duU, the 

 first segment greyish brown pruinose; it is clothed above with short, 

 black, at the sides with long, yellow hairs, but there are no bristles 

 at the hind margin of the segments. Venter grey with pale hairs, 

 Exterior genitalia small, the lower lamellæ somewhat blade-shaped, 

 directed upwards, the upper lamellæ nearly quite hidden, only their 

 upper margin seen; there is a somewhat long, cleft or furrowed 

 ventral lamella with partly whitish yellow hairs; the genitalia for the 

 rest black-haired. Legs black; coxæ greyish pruinose; front metatarsi 

 a little and hind metatarsi very slightly thickened, The posterior 

 femora each with two dense rows of somewhat thin bristles on the 

 ventral side; the middle femora also with some bristles dorsally, and 

 the hind femora with some on the anterior and posterior side and 



