. Diptera Danica: genera and species of flies hitherto found in Denmark. Diptera. 330 Orthorrhapha brachycera. third of the second joint, excised at the base and here with a small, black tooth, and a similar above at the base. The legs with short, pale hairs; the hairs on the anterior coxse and the bristle on the hind coxae likewise pale; the hairs below the femora very short and indistinct, the hind femora with long pale hairs above on the basal half; middle tibiae with a pair of bristles near the base, hind tibiae with a similar, small bristle, and with the bristle above the apex distinct. W
. Diptera Danica: genera and species of flies hitherto found in Denmark. Diptera. 330 Orthorrhapha brachycera. third of the second joint, excised at the base and here with a small, black tooth, and a similar above at the base. The legs with short, pale hairs; the hairs on the anterior coxse and the bristle on the hind coxae likewise pale; the hairs below the femora very short and indistinct, the hind femora with long pale hairs above on the basal half; middle tibiae with a pair of bristles near the base, hind tibiae with a similar, small bristle, and with the bristle above the apex distinct. Wings hyaline; veins black, the last part of the discal vein. Fif,'. 103. Wing of M. diadema dr. almost straight, somewhat converging towards the cubital vein; the last part of the postical vein half as long as the cross-vein. Squamulae whitish, the margin a little darker, the fringe whitish. Halteres yellow or pale yellow. Female. Quite agreeing with the male; the epistoma very slightly broader. Length 4—4,5 mm. Remarks: I do not quite understand Kowarz's expression: "Thorax ... erzgrun oder metallisch blaugriin, wenig grau bestaubt" as I find thorax grey, only slightly metallic when seen from behind. — I have examined Fabricius's type-specimens (two) of rostratus in the collec- tion of Tonder-Lund, and find them to be diadema. M. diadema is rather common in Denmark, but however some- what local; Amager, Dyrehaven, Hornbaek, Rervig, Tisvilde; on Funen at Odense; in Jutland at S0ndervig and Holstebro, and on Bornholm at Ronne. My dates are ^^/e—^*^/9. It is especially found on walls and boardings, and it seems to prefer sandy districts. Geographical distribution: — Europe down into Italy, and in Asia Minor; towards the north to middle Sweden. 11. M. jaculus Fall. 1823. Fall. Dipt. Suec. Dol. 5,7, var. a (Htjdrophorus). — 1824. Meig. Syst. Beschr. IV, 66, 14. — 1843. Zett. Dipt. Scand. II, 450, 10 (Hydrophorus). — 1857. Loew, Neue Beitr. V, 53. — 18
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Keywords: ., bookauthorlu, bookcentury1900, bookdecade1900, booksubjectdiptera
