Asilidae. 85 



below. Legs black, the tibiæ reddish at the base; coxæ greyish prui- 

 nose with somewhat long, wliitish hairs ; the hairs on the legs yellowish 

 grey hence giving the legs a greyish appearance; on the dorsal 

 side of the front tibiæ and -on the tarsi the hairs are black; long, 

 thin hairs are found on the ventral side of the front femora, on the 

 posterior side of the hind femora, and on the ventral side of the 

 tibiæ, on the hind tibiæ only a few; they are nearly all pale; on 

 the ventral side of the front femora there is a row of about five 

 strong bristles, nearly as strong as the spine-like bristles; they are 

 generally pale; spine-like bristles are found on the dorsal side of the 

 front femora, but here only a few, on the ventral and anterior sides 

 of the posterior femora, on the dorsal and posterior sides of the front 

 tibiæ and on the various sides of the posterior tibiæ except the 

 posterior side of the hind tibiæ, fmally a few at the apex on the 

 femora. They are for the most part yellow, on the dorsal side of 

 the front femora and tibiæ and some on the dorsal side of the middle 

 tibiæ generally black. The spine-like bristles on the tarsi are partly 

 black, partly yellow. Wings yellowish, there is a very broad greyish 

 fumigation round along the margin, so that only a narrow middle 

 part of the wing is hyaline ; the inner boundary of the fumigation is 

 distinct; veins brown. Halteres yellow. 



Female. Ovipositor black, shining, the ventral piece irregularly 

 striated on the apical half. 



Length 14 — 16 mm. 



This species is best known among the Danish species by the 

 strong, bristly hairs on the venter and the bristles on the pteropleura, 

 as also by the colour of the legs. 



E. arthriticus is very rare in Denmark, only five specimens have 

 been caught; at Hald near Viborg (J. G. Nielsen), at Silkeborg (A, Peter- 

 sen) and on Bornholm at Hasle (H. J. Hansen). The dates are in July. 

 It is recorded to occur especially in deserted and dry localities. 



Geographical distribution : — Northern and middle Europe down 

 into Austria ; towards the north to middle Scandinavia. 



±. E. cingulatus Fabr. 



1781. Fabr. Spec. Ins. II, iU,^h {Asilns) et 1805. Syst. Anll. 172,36 

 [Asilus). — 1842. Zett. Dipt. Scand. I, 170,6 et 1855. XII, 4565, 6 (^si/«<s). 



— 1849. Low, Lin. Entom. IV, 109, 57. — 1862. Schin. F. A. I, 157 (Asilus). 



— 1903. Kat. palåarkt. Dipt. II, 159. 



Male. Face yellowish grey, along the eye-margins yellow; epi- 

 stomal beard black above and down the sides, whitish yellow in the 

 middle, on each side of clypeus a row of black hairs. Palpi black 



