Empididae. 105 



11. E. albinervis Meig. 



1822. Meig. Syst. Beschr. II, 26,16. — 1862. Schin. F. A. I, 106. — 

 1893. Strobl, Mitth. Ver. Steierm. 1892, 74. — 1903. Kat. palaarkt. Dipt. 

 II, 233. — Empis albipennis: 1842. Zett. Dipt. Scand. I, 386, 20. — 

 Empis hyalipennis p.p.: 1862. Schin. F. A. I, 106. 



Male. Eyes contiguous ; epistoma greyish black. Occiput grey with 

 whitish hairs. Labrum dark brown, long and thin, but not twice as 

 long as the head is high. Antennæ black, third joint short, the style 

 somewhat long. Thorax grey with a slightly darker median stripe 

 and traces of a pair of lateral stripes. The dorsocentral and acrosti- 

 chal bristles short, biserial, black ; the former longer and uniserial 

 behind. Further a humeral bristle, a posthumeral, a couple of noto- 

 pleural, a supraalar and a postalar bristle, all black; besides there 

 are some smaller hairs on the sides. Scutellum with two black 

 marginal bristles. Pleura grey, metapleura with long, pale yellow, 

 bristly hairs; propleura with white hairs. Abdomen and venter grey, 

 clothed with longish, erect, yellowish hairs. Exterior genitalia rather 

 small, the lower lamellæ somewhat broad, with some long hairs at 

 the lower posterior angle; the upper lamellæ just seen at the apex 

 above the lower, but for the rest hidden. Penis thick at the base, 

 curved upwards between the lamellæ. The seventh dorsal segment 

 with a little tubercle in the median line. Legs black or blackish 

 brown ; coxæ greyish pruinose ; hind legs elongated, front and hind 

 metatarsi slightly thickened, and also the following two joints a little 

 thicker than those on the middle tarsi. Middle femora with rows of 

 long, bristly hairs on the ventral and postero-ventral side; hind 

 femora with short hairs and some thin bristles above, and a few 

 bristles ventrally; front tibiæ short-haired on the dorsal side and with 

 a short, but comparatively strong pubescence below and on the 

 posterior side; middle tibiæ with bristles and bristly hairs on various 

 sides, especially some (about four) long bristles on the dorsal side; 

 hind tibiæ with short, somewhat dense hairs ventrally and some 

 bristles dorsally; tarsi somewhat spinulous beneath, and with bristles 

 at the apex of the joints; front and hind metatarsi with somewhat 

 long hairs dorsally. The hairs and bristles are blackish or brownish. 

 Wings hyaline; veins white, also the costa or this slightly yellowish 

 towards the apex; the upper branch of the discai vein and the anal 

 vein abbreviated. Stigma almost not observable. Halteres pale yellow. 



Female. Frons medium-broad, grey. Abdomen short-haired. 

 Posterior legs compressed, middle femora slightly, hind femora distinctly 

 pennate above and below; likewise the middle tibiæ slightly, the hind 

 tibiæ distinctly pennate dorsally, the latter also with some scaly hairs 



