. 50 Orthorrhapha brachycera. strong hairs which are present numerously also in the praesutural depression. Scutellum with about eight 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 genitalia are large and somewhat curiously shaped; the lower lateral lamellai much arched, sending a little process backwards from their lower part, otherwise stretching up- wards and somewhat triangular,
. 50 Orthorrhapha brachycera. strong hairs which are present numerously also in the praesutural depression. Scutellum with about eight 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 genitalia are large and somewhat curiously shaped; the lower lateral lamellai 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 lamellae form almost a round disc with a verti- cal opening between them, which is closed below by the two lower pro- cesses; the lamella? are black, shining; the upper lateral lamellae stretch up- Fig. 14. Rh. vesiculosa, wards from the opening between the male genitalia. , , ,, j- . j i . lower, and they are du'ected somewhat forwards in over the abdomen; each lamellae is long, arched and some- what spoon-like dilated at the end, the two lamellae together are thus somewhat bladder-like. The upper lamellae are ferruginous at the base but yellowish white tow^ards the end. Both pairs of lamellae are only slightly haired at the margin, for the rest bare. On the dorsal side, at the base of the upper lamellae the eighth segment forms a pair of somewhat long-haired, squamular pieces. Penis is simply curved, ferruginous. Legs brownish; coxae dark greyish pruinose; the very apex of the hind femora, hind tibise and tarsi yellowish white, only the last joint brown; generally also the middle tibise somewhat pale at the base; the hind femora somewhat broad, hind tibiae rather short and thin, slightly curved, hind tarsi specially deli- cate, shorter than the tibiae; both tibiae and tarsi thinner than the anterior tibiae and tarsi. The anterior femora mainly short-haired with a row of longer hairs in the apical half on the
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Keywords: ., bookauthorlu, bookcentury1900, bookdecade1900, booksubjectdiptera
