110 Orthorrhapha brachycera. 



liairs; it has two transverse, snow-white, bands of somewhat long, 

 depressed hairs, one at the hind margin of the first, the other at the 

 front margin of the fourth segment, the latter is the broadest; the 

 bands are sometimes more or less interrupted in the middle; the fifth 

 segment is yellow haired at the hind margin, and the sixth and 

 seventh segments have a white haired hind margin; for the rest, the 

 abdomen is sparingly haired with erect, blacicish hairs, and fringed with 

 black hairs at the lateral margin; the first segment has yellow and 

 white hairs at the lateral margins in connection with the mentioned 

 yellow fringe and white band. Venter sparingly clothed with long, 

 black, and more densely with depressed, golden hairs. Legs black, 

 the tibiæ, especially the anterior, brownish; the hairs and bristles 

 black, the scaly hairs golden to a greater or less extent; the front 

 tibiæ with exceedingly small bristles. Wings black at the base, hya- 

 line at the apex; the border of the black colour stretches very 

 obliquely across the wing, beginning at the apex of the upper branch 

 of the cubital vein, then going inwards and bending downwards, thus 

 reaching the anal cell somewhat before its apex; the black colour 

 sends a prolongation down outwards to the apex of the discai cell, 

 this prolongation varies in size, and sometimes, but rarely, it may 

 reach the hind margin. The cross-veins on the blackish part are 

 lighter seamed. Costa with black hairs at the base. Squamula alaris 

 blackish or brownish fringed; frenulum with yellow hairs. Halteres 

 black, the apical part of the knob white. 



Female. Quite agreeing with the male, only the vertex and frons 

 slightly broader, the eye-margins diverging from the upper corner, so 

 that this corner is more abruptly curved than in the male. 



Length 4—10,5 mm. 



A. maurus is not rare in suitable localities; Vedbæk, Odsherred, 

 Tisvilde; in Jutland at Søndervig, Harboøre, Kandestederne south of 

 Skagen and at Skagen; on Bornholm at Rønne and Hasle. My dates 

 are ^^/e — V^. It occurs in sandy districts flying in the bright sunshine, 

 and as seen from the list of localities, it occurs especially at or near 

 the shore, both in pine woods and outside. Zeller (Isis 1840, 31.) 

 records, that he has seen it on flowers of Sedum acre. 



Geographical distribution: — Europe down into Italy; towards 

 the north to Lapland. 



3. A. afer Fabr. 

 1794. Fabr. Ent. Syst. IV, 258,7 et 1805. Syst. Antl. 122,15. — 

 1842. Zett. Dipt. Scand. I, 199, nota. — 1862. Schin. F. A. I, 50. — 

 1903. Kat. palåarkt. Dipt. II, 174. — 1820. A. fimhriata Meig. Syst. 

 Beschr. II, 154, 21, Tab. XVII, Fig. 13. 



