Asilidae. 3 1 



second and sixth segment. Venter black with pale incisures and, seen 

 from in front, with greyish pruinose iiind margins of the segments; it 

 is sparingly clothed with a little longer hairs than above which are 

 yellow in front but daricer baekwards. Legs with the coxæ brownish 

 black, at the outer side yellow pruinose and with long, yellow hairs; 

 femora and tibiæ ferrugineous, the femora with a black spot at the 

 outermost apex; the front tibiæ darkened towards the apex or to near 

 the base; all tarsi black. The legs sparingly clothed with short, 

 black hairs, the dense hairs on the apical ventral side of the tibiæ 



Fig. 1'2. Wing of D. teiitonus. 



and beneath the tarsi brownish; the stronger spine-like bristles black. 

 Wings yellow at the basal part, at the apex somewhat brownish, 

 especially along the veins; the veins yellow at the base, brownish 

 outwards. Halteres yellow. 



Female. With exception of the genital differences chiefly agreeing 

 with the male; the wings yellow at the base, then a more hyaline 

 part follows, the apex is slightly greyish. 



Length 17 — 19 mm. 



D. feutomts is very rare in Denmark, only two specimens have 

 been found, both females, one with the locality North Sealand (Gosch), 

 the other at Fuglevad. 



Geographical distribution: — Middle and southern Europe; its 

 northern limit lies in Denmark and it is not known from Scandinavia 

 nor from Britain. 



4. Leptartlipus Steph. (1829). 



Isopogon Low, 1847. 



Species of middle size and blackish colour. Head slightly broader 

 than the thorax and much broader than high ; it is short and it is flat 

 behind. The face is broad, somewhat arched, but without any distinct 

 callus. The epistomal beard somewhat woolly and evenly extended 

 over the whole face. Antennæ inserted near to each other somewhat 

 above the middle. Jowls small, very slightly descending below the 

 eyes. No oceliar bristles. Antennæ consisting of five joints, the two 

 first short, of equal length, the third long, somewhat compressed. 



