158 Orthorrhapha brachycera. 



Male. Verlex and frons velvet black; epistoma blackish grey; palpi 

 greyish black, with black hairs, Occiput velvet black, the hairs blackish. 

 Antennæ black. Thorax black, slightly, somewhat fatty shining; be- 

 tween the dorsocentral and acrostichal bristles there is on each side 

 a more shining, and generally somev^hat greyish, narrow stripe. The 

 dorsocentral and acrostichal bristles rather short, black; the former 

 miiserial, slightly longer behind, the latter biserial. Further a humeral 

 bristle, a posthumeral, about three notopleural, a supraalar and a 

 postalar bristle, all black and not long. Pleura dark grey. Scutellum 

 with four black marginal bristles, the inner longest. Abdomen greyish 

 black, a little shining, short-haired, with a little longer, bristly hairs 

 at the hind margin of the segments; the hairs black. Venter grey, 

 short-haired. Exterior genitalia somewhat compressed, a little haired 

 on the sides; the lamellæ short. Legs black; coxæ greyish pruinose; 

 knees yellowish. Front legs short, and the legs upon the whole some- 

 what short. Front femora with fine hairs above and below; middle 

 femora with somewhat short, bristly hairs on the antero-ventral side; 

 hind femora with fine hairs above and below; front tibiæ with fine, 

 short hairs above and a few bristly hairs, generally one above the 

 middle and two at the apex; middle tibiæ only with in- 

 conspicuous, short, bristly hairs; hind tibiæ likewise with 

 very short, inconspicuous, bristly hairs on the dorsal and 

 anterior side. Front tibiæ distinctly thickened towards the 

 apex, front metatarsi about twice as thick and about three 

 fourths of the length of the tibiæ, and as long as the 

 four foUowing joints; they are ovate, straight below, slightly 

 arched above; the hairs above are a little longer than 

 below, and at the apex is a longer hair ; the four following 

 joints broader than long; third and fourth joint on the 

 hwitt'ata ^niddle tarsi likewise broader than long, on the hind tarsi 

 front leg. a little longer than broad. The hairs and bristles are black. 

 ^ ■ Wings somewhat brownish tinged. Veins dark brown ; the 

 upper branch of the cubital vein somewhat diverging, anal vein visible 

 to, or almost to the margin. Stigma large, brown. Halteres blackish. 

 Female. Similar to the male; the thoracic bristles of the same 

 length. Front metatarsi simple, about halfas long as tibiæ; third and 

 fourth joint broader than long, and also so on the middle tarsi, on 

 the hind tarsi slightly longer; hind tibiæ slightly dilated and a little 

 curved. 



Length 3 or about 3 mm. 



The short front legs are characteristic for this species. 



H. hivittata seems to be very rare in Denmark, only three speci- 



