72 Orthorrhapha brachycera. 



Frerslev Hegn, Tyvekrogen, Tisvilde and at Skelskør; on Funen at 

 Odense and Middelfart; in Jutland at Bangsbo and Frederikshavn. 

 My dates are ^/r, — ^^li. It occurs both in woods and on fieids. Pupæ 

 have been found in the earth in Dyrehaven on ^"^/s and in Ruderhegn; 

 moreover at Ørholm in sandy ground on ^^/s; the first mentioned 

 developed on ^^lo and the latter on ^/o. 



Geographical distribution: — Northern and middle Europe down 

 into France; towards the north to northernmost Scandinavia. 



2. D. trigonus Meig. 



1804. Meig. Klass. eur. Zweifl. Ins. I, 247, 7 (Asilns). — 1848. Low, 

 Linn. Entom. III, 443,8 {Lophonotus) . — 1862. Schin. F. A. I, 146 {Asilus). 

 — 1903. Kat. palåarkt. Dipt. II, 149. — 1842. Asilus hispidus Zett. Dipt. 

 Scand. I, 176, 10 et 1855. XII, 4577, 10. 



Male. Eyes in the living specimens greenish, slightly metallic. 

 Face greyish white; epistomal beard white in the middle, black below, 

 some black hairs continuing up the sides ; above it is black or white 

 or with hairs of both colours. Palpi black with vvhitish hairs. Frons 

 and vertex greyish brown with black, posteriorly yellow, hairs. Occi- 

 put greyish pruinose; occipito-orbital bristles black above, yellow^ on 

 the sides; the hairs yellowish, downwards whiter. Antennæ black, 

 the two first joints with black and whitish hairs, the hairs below 

 the first joint long. Thorax yellowish or greyish brown, the middle 

 stripe dark brown, distinctly divided in the w^hole length; the side 

 stripes not large, between the middle and the side stripes a distinct, 

 rather broad, brownish stripe, somewhat confluent with the middle 

 stripe. Thorax clothed with long, erect, black hairs, which are 

 slightly longer behind; the bristles black, those at the sides yellow. 

 Scutellum partly black, partly yellow, with erect hairs and many 

 marginal bristles which are yellow. Pleura brownish pruinose with 

 some longer, whitish hairs; the long hairs on meta- and hypopleura 

 yellow. Abdomen greyish brown with an indistinct, darker middle 

 line or a row of triangles which are more distinct with the light from 

 behind; when lighted in this way abdomen shows a large, triangle- 

 shaped dark spot on each segment, the hind margins and the hind 

 corners being grey. Venter grey. Abdomen clothed with yellow, in 

 the middle line with black, hairs; at the sides the hairs are rather 

 long; at the hind margins of the segments there are very long, yellow 

 bristles which are directed out to the sides. Venter sparingly clothed 

 with long, whitish hairs ; the eighth segment has no fringe. The 

 abdomen is somewhat compressed and wedge-shaped towards the 

 dorsal side. The genitalia are black; they are small, the arms of the 

 upper forceps are slightly curved downwards, the apex is blunt and 



