70 Orthorrhapha brachycera. 



yellow, also the coxæ; tarsi more or less browned. The anterior 

 femora short-haired ; hind femora likewise, but with a single ventral 

 bristle about in the middle and an antero-dorsal bristle nearer the apex ; 

 front tibiæ with a single bristle on the dorsal side, and with slightly 

 longish and fine hairs ventrally; middle tibiæ with some very short 

 bristles on the various sides; hind tibiæ with one or two bristles 

 ventrally, and with two dorsal rows of slightly longer bristles. Tarsi 

 short-haired, the front tarsi with hairs below like those on the tibiæ; 

 the posterior tarsi very slightly spinulous beneath. The hairs and 

 bristles blackish or brownish. The ordinary clothing on the legs not 

 sparse, darker or paler brown. Wings strongly brown fumigated, 

 somewhat irridescent; veins brown, the anal vein looks abbreviated, 

 but generally a very slight trace is observable to the margin (not to 

 be confused with the fold found here). Stigma brownish, little con- 

 spicuous. Halteres paler or darker brown. 



Female. Very unlike the male, but only as to colour. Eyes 

 separated, frons narrow, brownish. Thorax reddish yellow, with three 

 paler, slightly greyish stripes, or thorax might be termed yellowish 

 with two stripes and the sides reddish. Scutellum, pleura and ab- 

 domen yellow. Thorax and abdomen haired as in the male. Legs 

 as in the male and haired in the same way. Wings hyaline, slightly 

 yellowish tinged; veins paler brown, anal vein as in the male, but a 

 little more distinctly traceable to the margin, and the apex just at 

 the margin generally a little more distinct. Stigma very faint. Halteres 

 yellow. 



Length 3,5 — 4 mm. 



This species stands somewhat curiously between the two pre- 

 ceding; the male resembles the male of Rh. cAilicina, but is however 

 easily distinguished ; it is smaller and has darker wings, and the anal 

 vein is more distinct in cuHcina; the genitalia in lujhrida are more 

 conspicuous, shining, and the upper lamellæ larger, directed upwards 

 and not styliforra ; finaily culicina has the front tibiæ more densely 

 haired below and has no bristle ventrally near the middle on the 

 hind femora. The female on the other hånd closely resembles the 

 female of flava, but may be distinguished with certainty; it is smaller, 

 the colouration of thorax is different, as -fiava has a uniformly yellow 

 thorax without stripes; the antennæ are not as in flava inserted 

 above the middle, they have the basal joints only brownish, not yel- 

 low; and also in this sex the bristle below the hind femora is charac- 

 teristic; fmally flava has the anal vein quite abbreviated. That the 

 two sexes really belong to one species is beyond doubt, Zetterstedt 

 has taken them in copula, and also here they have been taken, to 



