42 Orthorrhapha brachycera. 



rowed at the margin; anal cell closed or nearly closed. Alula distinct; 



alar squannila small, hairy at the margin. 



The larval and pupal stages of this genus are not known, 



The species of Cyrtopogon oceur mainly in mountainous regions; 



they are recorded often as found sitting on stems and similar piaces in 



contradistinction to most other Dasypogoninæ. I know nothing about 



the prey of this genus. 



Of the genus 20 palæarctic species are known; one is found in 



Denmark. 



1. C. lateralis Fall. 



1814. Fall. Dipt. Suec. Asilid. 12, 2 (Dasypogon). — 1842. Zett. Dipt. 

 Scand. I, 177,2 et 1849. VIII, 2971,2 et 1855, XII, 4578,2 (Dasypogon). 

 - 1847. Low, Linn. Entom. II, 523,41. - 1862. Schin. F. A. I, 134. — 

 1903. Kat. palåarkt. Dipt. II, 126. 



Male. Face blackish, greyish white pruinose; epistomal beard 

 black. Proboscis and palpi black. Frons black in the middle, some- 

 what shining, dark grey at the sides; frons and vertex with black 

 hairs. Occiput dark grey, whitish along the posterior eye-margin ; the 

 hairs black above, whitish below. Antennæ black with the hairs on 

 first and second segment black. Thorax black, dull, two approximate 

 median lines, not reaching the scutellum, very deep black and 

 slightly less dull; the margin of the disc brownish grey, the grey 

 colour produced inwards with a pointed prominence at the humerus, 

 and again at the transverse furrow, here continued more or less 

 distinct to the inner end of the furrow, then the grey margin con- 

 tinues to the postalar callus and from here sends a prominence for- 

 wards; the postalar callus is ashgrey; there is a very faint dark 

 brownish line in the middle between the median lines, and one out- 

 wards on each side of these, thus three in all; at the inner ends of 

 the transverse furrow lies a whitish grey, distinct spot; fmally the 

 disc is ashgrey in front of the scutellum; thus the black colour forms 

 two median stripes and two side spots which latter are rounded in 

 front, more pointed backwards and divided by the transverse furrow. 

 Scutellum ashgrey in the middle. The disc is clothed with longish, 

 black hairs which are longest posteriorly, scutellum with long, black 

 hairs, especially long at the margin. The bristles on thorax are black. 

 Pleura brownish grey pruinose, meso- and sternopleura with longer 

 hairs, on the first blackish, on the latter white; the long hairs on 

 metapleura white. Abdomen black, shining; the second segment over 

 somewhat more than the posterior half and the whole third segment 

 yellowish grey pruinose with exception of the anterior corners which 



