Asilidae. 69 



are often pale basally on the ventral side and on the posterior side of 

 the hind femora. The spine-Hke bristles on the tarsi almost all black. 

 Wings almost hyaline or sometimes yellowish, greyish fumigated at the 

 apex and the anterior margin ; veins brown, Halteres pale yellow. 



Female. Ovipositor thick and swollen, shining black, at the apex 

 and below clothed with dense, bright ferrugineous hairs. The long, 

 thin hairs on the femora are shorter and less dense than in the male, 

 and they are not found on the tibiæ; at the base on the ventral side 

 of the front femora there are three to five long spine-like bristles. 



Length 16—19 mm. 



This species is easily known by its somewhat thick-set shape; 

 the female is at once recognised by its curious, bulbous ovipositor. 

 On account of the shape of the ovipositor the female may at first 

 glance be taken for a male, and this has also been done several times, 

 e. g. by Ruthe {A. xantJwpygus, Isis 1831, 1220) and Zeller {A. auri- 

 flims, Isis 1840, 5], 4). 



A.varipes is rare in Denmark; it was for the first time taken in 

 1904 at Tisvilde (Klocker), two specimens; in 1906 I caught one spe- 

 cimen at Ørholm, and two specimens were taken at Tisvilde (Engel- 

 hart, Weiss), fmally in 1907 I caught seven specimens at Tisvilde. 

 The dates of captm-e are ^^/e to the first days of September. It occurs 

 on sandy piaces, especially in pine-woods. 



Geographical distribution: — Northern and middle Europe down 

 into France; its northern limit hes in southern Scandinavia. 



13. Dysmaclius Low. 



{Lophonotus Macqu.) 



Species of medium or somewhat small size, densely bristly, of 

 greyish or brownish colour. Face somewhat broad, slightly widened 

 downwards; epistomal cailus large, at all events occupying more than 

 half the height of epistoma. Antennæ placed somewhat above the 

 middle, the hairs on the under side of the first joint long. The facets 

 in the front part of the eye distinctly enlarged. The dorsocentral 

 bristles long, continued to or near to the front margin. Abdomen 

 somewhat compressed, and somewhat wedge-shaped upwards, especially 

 in the female; bristles at the hind margins of the segments present. 

 Front femora without spine-like bristles on the ventral side. The 

 male genitalia small or larger; the ventral lamella shining black. The 

 female ovipositor compressed with the lamellæ not free, wedged in. 



Of the genus 38 species are known from the palæarctic region; 

 2 have been found in Denmark. 



