Empididae. 181 



Strobl); towards the north to southern Sweden. It seems everywhere 

 to be a rare species. 



25. H. flavipes Meig. 



1822. Meig. Syst. Beschr, III, 11, 19. — 1862. Schin. F. A. I, 113. 

 1892. Strobl, Verh. Zool. bot. Geseli. Wien, XLII, 160, 45. — 1903. Kat. 

 palaarkt. Dipt. II, 250. 



Male. Eyes contiguous; vertex black; epistoma dark grey; palpi 

 whitish yellow, with dark hairs. Occiput dark grey, with blackish, 

 dovvnwards with pale hairs. Antennæ black. Thorax black, shining. 

 The dorsocentral and acrostichal bristles black, the former uniserial, 

 only slightly longer behind, the latter biserial. Further a small hunieral 

 bristle, a posthumeral, two notopleural, a supraalar and a postalar 

 bristle, all black. Pleura grey. Scutellum with four black marginal 

 bristles. Abdomen dull blackish brown or black, sometimes lighter 

 towards the base; it is dark-haired, the hairs at the hind margin of 

 the segments only very slightly longer. Venter yellowish. Exterior 

 genitalia small, compressed, the lamellæ a little shining. Legs long 

 and slender, tarsi long, front metatarsi simple, not thickened; the legs 

 are yellow, also the coxæ, the posterior coxæ a little darker; the 

 apical part of the hind femora and the tibiæ towards the end slightly 

 darker, tarsi brown, blackish towards the apex. Front femora with 

 longish, fine hairs on the posterior side and below; middle femora 

 with a few bristles on the anterior side in the basal part; hind femora 

 with a row of long, somewhat strong hairs above, and finer hairs 

 below; front tibiæ with short hairs, a little longer above, but without 

 bristles; hind tibiæ with a row of fine bristles on the dorsal side. 

 All tarsal joints longer than broad. The hairs all paler or darker 

 brownish. The pulvilli are conspicuous and rather large. Wings 

 slightly greyish or yellowish tinged. Veins brown to dark brown; the 

 upper branch of the cubital vein somewhat diverging; anal vein 

 distinct, but not reaching the margin; discai cell somewhat broad. 

 Stigma blackish brown. Halteres with the peduncle yellow, the knob 

 blackish brown to black. 



Female. Similar to the male, but the frons broad, grey. Thorax 

 a little pruinose behind; abdomen generally more or less brownish, 

 with light incisures. The posterior coxæ yellow; hind tibiæ simple. 

 Halteres (in my specimens) quite yellow. 



Length 2,5—3 mm. 



This species is at once recognised in the male by the contiguous 

 eyes; the female is known from the female of cincjulata by the black 

 thorax and the not red basal joints of the antennæ. 



