328 Orthorrhapha brachycera. 



of the lowermost. Antennæ black, third joint short, roundish; arista 

 long, apical or almost so. Thorax dark brownish pruinose, duU, the 

 area in front of the scutellum and this latter grey pruinose, and some- 

 times thorax somewhat grey; the acrostichal bristles short, but gener- 

 ally distinct; the dorsocentral rows consisting of some short hairs in 

 front, then follow generally two a little longer bristles, and two long 

 bristles behind. Scutellum with four bristles. Pleura dark grey pruinose ; 

 propleura with two or three black prothoracie bristles. Abdomen 

 black, somewhat greyish pruinose, clothed with short, black hairs, and 

 with a little longer hindmarginal bristles on the first segment. Hypo- 

 pygium somewhat large, black; the eighth segment very slightly 

 pruinose, with some dark hairs; the ventral lobes long, straight, with 

 an excision and two downwards turned points at the apex, and here 

 with some hairs; the outer lamellæ somewhat narrow, only a little 

 shorter than the ventral lobes, hairy; both pairs brownish or dark 

 brown. Legs black, coxæ slightly greyish pruinose; hind metatarsus 

 almost half as long as the second joint, only with a small excision but a 

 pair of somewhat distinct teeth at the base. The legs with short, 

 black or brownish black hairs; the bristly hairs on the anterior coxæ 

 and the bristle on the hind coxæ black; the hairs below the femora 

 very short and indistinct, hind femora with long hairs above on the 

 basal half; middle tibiæ with one or a pair of bristles near the base, 

 hind tibiæ with the bristle above the apex somewhat distinct. Wings 

 slightly brownish grey tinged, oralmost hyaline; veins black, the last 

 part of the discai vein straight or almost so, somewhat converging 

 towards the cubital vein; the last part of the postical vein a little 

 longer than the cross-vein. Squamulæ dirtily yellowish or brownish, 

 with a blackish margin and a brown or pale brown fringe. Halteres 

 blackish, brownish or paler, but then the upper part of the knob dark. 



Female. Quite agreeing with the male. 



Length 2,2 — 2,5 mm. 



M. infumatus is rare in Denmark, only seven speciraens are known, 

 taken in Geel Skov and Tyvekrogen in 1908 and 1909 on ^'''lo—'^^ib 

 (the author). It was taken on tree-trunks. 



Geographical distribution:— Europe down into Italy; towards 

 the north to northern Sweden. 



10. M. diadema L. 



1767. Linn. Syst. Nat. XII, 2, 982, 19 {Musca). — 1857. Loew, Neue 

 Beitr. V, 54. - 1862. Schin. F. A. I, 237. — 1877. Kow. Verhandl. zool. 

 bot. Geseli. Wien, XXVII, 62, 18, Taf. II, Fig. 14—16. — 1903. Kat. 

 palåarkt. Dipt. II, 337. — Medetera carnivora Fisch. 1819. Programme etc. 



