Empididae. J99 



the præsutural depression. Scutellum with six long, yellow bristles. 

 Pleura black, shining. Abdomen likewise black, shining, with some- 

 what long, whitish yellow hairs. Venter brownish to yellowish, gener- 



Fig, 79. Antenna of Oe. stigmatelia, x 65. 



ally darker towards the apex. Legs whitish yellow, hind femora 

 with the apical half dark brown, hind tibiæ dark brown, the basal 

 part white; anterior tarsi light brownish, the metatarsi almost quite 

 pale, the hind tarsi darker brown, only the very base of the meta- 

 tarsi yellow. The legs pale yellowish haired quite in the usual way, 

 and the hind femora likewise with black spines below on the apical 

 part. Wings slightly tinged. Veins brown. Stigma brown. Halteres 

 pale yellow. 



Female. Similar to the male, but the eyes well separated, the 

 frons black, shining. The hairs on abdomen a little shorter than in 

 the male, and the venter generally yellow; ovipositor black or brownish. 



Length 3,5 mm. 



This species is distinguished from the preceding by the bristle- 

 shaped antennal style and the dark apical part.of the hind femora; 

 also the venter seems always to be more or less pale. — Immature 

 specimens may have the thoracic disc and the pleura lighter to 

 brownish or reddish. 



Oe. stigmatella is like the preceding a rare species ; only six spe- 

 cimens are known; Ordrup Mose (Stæger); on Lolland at Maribo and 

 Ryde (Schlick) ; the dates are only ^"/e — ^^/e. 



Geographical distribution : — Northern and middle Europe down 

 into Austria; towards the north to northern Sweden. (It has been 

 recorded from North America, but is later described by Melander as 

 Oe.ohioensis; see Mel. Trans. Amer. Ent. Soc. XXVIII, 1902, 347). 



4. Oe. Holmgreni Zett. 



1852. Zett. Dipt. Scand. XI, 4267, 3-4. — 1859. Loew, Neue Beitr. 

 zur Kenntn. der Dipt. VI, 49, 7. — 1903. Kat. palåarkt. Dipt. II, 259. 



Male. Eyes touching; epistoma black; proboscis straight, palpi 

 black. Occiput black, shining, with black, below with whitish hairs. 

 Antennæ not long, very slightly longer than in stigmatella, blackish 

 brown, the style thin, bristle-shaped and very short. Thorax black, 

 shining, with short, greyish white hairs, leaving two very narrow, 

 bare stripes. Of bristles a notopleural and a postalar bristle present, 



