66 Orthorrhapha brachycera. 



Male. Eyes separated, frons narrow, brownish; epistoma extremely 

 narrow, brownish. Occiput grey, with black hairs; labrum somewhat 

 longer than, towards twice as long as the head is high, yellow; palpi 

 pale yellow with a dark hair at the apex. Antennæ somewhat longer 

 than the head, inserted somewhat high, above the middle, brownish 

 black; the two basal joints yellow, with short, dark hairs, the first 

 joint long and slender, about twice as long as the second; the third 

 joint elongated, strongly attenuated towards the apex, the style long, 

 not much shorter than the third joint. Thorax yellow, only slightly 

 shining. The dorsocentral bristles long, uniserial, somewhat longer 

 behind, the acrostichal bristles short, somewhat indistinctly biserial, 

 all black, Further a humeral bristle, a posthumeral, about two noto- 

 pleural, one or two supraalar and a postalar bristle, all black; besides 

 there is a bristle in front inwards to the humeri, and some smaller 

 hairs. Scutellum with four black marginal bristles. Pleura yellow, 

 metapleura with black hairs, Abdomen relatively long and slender, 

 yellow, a liltle pruinose and slightly shining; sometimes it is a little 

 darkened above, especially towards the apex; the incisures may be 

 indistinctly brownish ; it is somewhat sparingly haired with short, black 

 or dark brownish hairs; those at the hind margins of the segments 

 are slightly longer and stronger, especially in front. Venter yellow 

 with short hairs, and also with a few longer at the hind margins of 

 the segments. Exterior genitalia small and inconspicuous; the lower 

 lamellæ somewhat triangular, the upper (as far as I could see) some- 

 what styliform. Penis a short, somewhat thick, upwards curved thread. 

 Legs long and slender, yellow, tibiæ slightly brownish towards the 

 apex, tarsi brownish ; coxæ yellow. Anterior femora short-haired with 

 slightly longer hairs on the antero-ventral side and with a few bristly 

 hairs at the apex; hind femora similarly haired, in the apical fourth 

 part with a few thin bristles on the ventral and anterior sides; an- 

 terior tibiæ short-haired; the middle ones with a few bristles on 

 various sides; hind tibiæ with some bristles in two dorsal rows. Tarsi 

 short-haired, middle and hind tarsi slightly spinulous beneath. The 

 hairs and bristles black or at all events dark. The ordinary clothing 

 of short hairs is somewhat dense, the hairs not adpressed and rather 

 conspicuous, also on account of their dark colour. Wings hyaline, 

 very slightly yellowish tinged; veins brownish, anal vein not reaching 

 the margin. Stigma faint, yellowish. Balteres yellow or pale yellow. 



Female, Frons slightly broader than in the male, epistoma much 

 broader, greyish; otherwise it is quite similar to the male, also with 

 regard to the hairiness of the legs. 



Length 4—4,8 mm. 



