Asilidae. 39 



and the abdominal at the front margins of the segments. The sheaths 

 of the legs reach to the hind margin of the third, and the sheaths 

 of the wings a Httle beyond the hind margin of the first abdominal 

 segment. 



The larvæ live in the ground on sandy localities, and the pupæ 

 are found at the same piaces. The larvæ hibernate, and the trans- 

 formation to pupa and the development of the imago take place in 

 the follov^ing spring. 



The species of Lasiopogon occur especially in or near woods on 

 dry and more or less sandy localities. I have never succeeded in 

 seeing any Lasiopogon with prey; Poulton 1. c. records from England 

 as prey for L. cinctus: Pachyrrhina lineata Scop. {histrio F.), the 

 Lasiopogon being taken three times with the same prey. 



Of the genus 6 species are known from the palæarctic region; 

 one is found in Denmark. 



1. L. cinctus Fabr. 



1781. Fabr. Spec. Ins. II, 465, 29 (Asilus). — 1842. Zett. Dipl. Scand. 

 I, 177, 1, et 1849. VIII, 2970, 1, et 1855. XII, 4578, 1 {Dasypogon). — 

 1847. Low, Linn. Entom. II, 509, 35. - 1862. Schin. F. A. I, 133, — 

 1903. Kat. palåarkt. Dipt. II, 122. 



Male. Face greyish brown pruinose; epistomal beard black. Pro- 

 boscis and palpi black, the former with whitish hairs. Frons and 

 vertex dark brownish, with blackish hairs. Occiput brownish above, 

 lower down greyish white, the hairs black above, white below. An- 

 tennæ black, the two first joints with black hairs. Thorax brownish 

 pruinose, with two dark brown lines on the disc, widened and some- 

 what curved towards the humeri; between these lines a simiiar, nar- 

 row line in the middle, not reaching the scutellum. The thoracic disc 

 with erect, black hairs; the bristles black and long, longest on the 

 hind part; the scutellar bristles likewise black. Pleura brownish 

 pruinose, a row of hairs along the hind margin of the mesopleura 

 and the long hairs on the metapleura black. Abdomen black, shining, 

 the hind margin of the segments narrowly ashgrey, the hind corners 

 more broadly grey and ttiis colour is produced forwards so that 

 nearly all the side margin is more or less distinctly grey. Venter 

 black, somewhat greyish pruinose, with more or less distinct pale 

 hind margins of the segments. Abdomen on the dorsal side is 

 clothed with very short, black hairs in the middle, and along the 

 sides with long hairs which become shorter towards the apex; these 

 hairs are yellow or greyish on the front part but become darker 

 backwards and are black at the end. Venter sparingly clothed with 



