150 Orthorrhapha brachycera. 



The first four segments with short, depressed hairs which are partly 

 black on the black parts, yellowish on the bands; the first segment 

 has somewhat longish hairs at the hind margin ; the last segments 

 have short, erect, yellow hairs; the fourth segment has both depressed 

 and erect hairs. Venter with long, white hairs on the first three seg- 

 ments, and with short, erect, yellow hairs on the last four segments. 

 Femora with the hairs shorter than in the male, 



There is a variety of the species, which is much greyer than the 

 ordinary form, all the yellow colour in the latter being here grey; 

 the hairs are likewise much greyer or whitish, (var. canescens Zett. 

 Dipt. Scand. XIII, 4971, 4, var. b). 



Length 7 — 9 mm. 



The pupa has a length of 10 mm. 



Remarks: In this species I have found the fourth postorior cell 

 narrowly open in rare cases, but in both sexes. 



This species is in the female at onze recognised by its fronta^ 

 callus forming two tubercles; in the male it is distinguished by the 

 indefinitely bounded greyish yellow or greyish, transverse bands on 

 the abdominal segments, and by its small size. 



T.hipunctata is not common in Denmark; Charlottenlund, Tisvilde, 

 Rørvig, Refsnæs; on Funen at Odense; in Jutland at Villebølle north 

 of Ribe, at Silkeborg, Himmelbjærget, Struer, Frederikshavn, Skagen 

 and on Læsø. My dates are ^^h to the first half of August. It occurs 

 often in somewhat sandy piaces on Urtica. The pupa was found at 

 Refsnæs in sand on ^/s, it developed on ^s. 



Geographical distribution: — Europe and down into Egypt; to- 

 wards the north in southern Scandinavia. 



7. T. annulata Fabr. 



1805. Fabr. Syst. Antl. 68, 11 {Bihio). — 1892. Zett. Dipt. Scand. I, 

 210, 10 et 1855. XII, 4589, 10. — 1847. Loew, Dipt. Beitr. II, 35, 20. - 

 1862. Schin. F. A. I, 165. — 1903. Kat. palåarkt. Dipt. 207. — 1805. 

 Bihio anilis Fabr. (non L.), Syst. Antl. 68, 13 (et op. præc). 



Male. Somewhat silvery shining; frons and face greyish white 

 with white hairs; occiput coloured and haired in the same way; 

 occipito-orbital bristles somewhat strong, black, but only present over 

 a short distance. The hairs on vertex yellowish. Antennæ greyish 

 pruinose, the first joint with black, and at the base with white hairs. 

 Thorax grey with two whitish stripes, densely clothed with white 

 hairs on the disc and the sides. Four dorsocentral bristles. Abdomen 

 greyish white with long, silver-white hairs. Venter whitish grey, 

 sparingly clothed with white hairs. Legs with the coxæ and femora 



