330 Orthorrliapha 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 coxæ and the bristle on the 

 hind coxæ likewise pale; the hairs below the femora very short and 

 indistinct, the hind femora with long pale hairs above on the basal 

 half; middle tibiæ with a pair of bristles near the base, hind tibiæ 

 with a similar, small bristle, and with the bristle above the apex 

 distinct. Wings hyaline; veins black, the last part of the discai vein 



Fig. 103. Wing of M. diadema d". 



almost straight, somewhat converging towards the cubital vein; the 

 last part of the postical vein half as long as the cross-vein. Squamulæ 

 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 Ko warz's expression : "Thorax 

 . . . erzgriin oder metallisch blaugriin, wenig grau beståubt" as I fmd 

 thorax grey, only slightly metalJic when seen from behind. — I have 

 examined Fabricius's type-specimens (two) of rostratus in the collec- 

 tion of Tonder-Lund, and fmd them to be diadema. 



M. diadema is rather common in Denmark, but however some- 

 what local; Amager, Dyrehaven, Hornbæk, Rørvig, Tisvilde; on Funen 

 at Odense; in Jutland at Søndervig and Holstebro, and on Bornholm 

 at Rønne. My dates are ^'o/e— ^^/y. 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. 



1 1. M. jaculus Fall. 



1823. Fall. Dipt. Suec. Dol. 5,7, p.p. var.« {Hydrophorus). — 1824. 

 Meig. Syst. Beschr. IV, 66, 14. — 1843. Zett. Dipt. Scand. II, 450, 10 

 {Hydrophorus). — 1857. Loew, Neue Beitr. V, 53. — 1862. Schln. F. A. 



