50 



Orthorrhapha brachycera. 



Fis 



14. Bh. vesiculosa, 

 male s?enitalia. 



strong hairs whlch are present numerously also in the præsutural 

 depression. Scutellum with about eiglit black marginal bristles. Pleura 

 dark grey, metapleura with black hairs. Abdomen robust, dark grey, 

 mainly dull; it is densely clothed with dark brownish hairs, which 

 are somewhat long and erect in front, short behind. Venter grey 

 with somewhat short hairs. The genitaha are large and somewhat 

 curiously shaped; the lower lateral lamellæ much arched, sending a 



little process backwards from their 

 lower part, otherwise stretching up- 

 wards and somewhat triangular, but 

 with the outer margin curved; seen 

 directly from behind the two lamellæ 

 form almost a round disc with a verti- 

 cal opening between them, which is 

 closed below by the two lower pro- 

 cesses; the lamellæ are black, shining; 

 the upper lateral lamellæ stretch up- 

 wards from the opening between the 

 lower, and they are directed somewhat 

 forwards in over the abdomen ; each lamellæ is long, arched and some- 

 Avhat spoon-like dilated at the end, the two lamellæ together are 

 thus somewhat bladder-like. The upper lamellæ are ferruginous at 

 the base but yellowish white towards the end. Both pairs of lamellæ 

 are only slightly haired at the margin, for the rest bare. On the 

 dorsal side, at the base of the upper lamellæ the eighth segment 

 forms a pair of somewhat long-haired, squamular pieces. Penis is 

 simply curved, ferruginous. Legs brownish; coxæ dark greyish pruinose ; 

 the very apex of the hind femora, hind tibiæ and tarsi yellowish 

 white, only the last joint brown; generally also the middle tibiæ 

 somewhat pale at the base; the hind femora somewhat broad, hind 

 tibiæ rather short and thin, slightly curved, hind tarsi specially deli- 

 cate, shorter than the tibiæ; both tibiæ and tarsi thinner than the 

 anterior tibiæ and tarsi. The anterior femora mainly short-haired 

 with a row of longer hairs in the apical half on the postero-ventral 

 side; hind femora likewise short-haired, but with some bristles on the 

 ventral and anterior side; posterior femora with a very dense and 

 short pubescence below; anterior tibiæ short-haired, with some fine 

 bristles dorsally; hind tibiæ very short and finely spinulous on the 

 ventral side; tarsi short-haired. All hairs and bristles black or dark 

 brownish. Wings hyaline, veins pale yellow; anal vein reaching the 

 margin. Stigma narrow, very faint, yellowish. Halteres yellowish 

 brown, the knob darkest. 



