36 Oitliorrhapha biachyceia. 



3. O. Fallenii Stæg. 



1844. Stæg. Stet. Ent. Zeit. V. 410. 3. - 1862. Scliin. F. A. I. 12. 

 — 1903. Kat. paliiarkl. Dipt. II. i± — 1S17. Stratiomiis InjpuJeon, Fall. 

 Dipt. Suec. Strat. 10, 7. — 184:2. Oxycera hypoleon p.p. Zett. Dipt. Scaiid. 

 i, 142. 1. — 1849. Oxycera hypoleon Zett. "ibid. VIII. 2955, 1. 



Male. Eyes long haired; tlie facets in tlie upper two thirds larger 

 than below, on the dividing line a reddLsh band. The eye-suture is 

 longer than in Meigeiiii. the front not asccnding over the niiddie of 

 the head. Face and frontal triangle black. tiie latter at the apex with 

 a yellow spot, which is silver-white haired. Antennæ reddish brown, 

 the basal joints blackish. Thorax black, with two yellow stripes. 

 which are pointed in front and not reaching the humeral spot. they reach 

 backwards to the transverse furrow. or are produeed over this as a small 

 spot. Humeral callus and the margin of the thorax broadly yellow, sending 

 an oblique yellow spot down on the pleura anterior to the wing-rool: 

 the postalar callus yellow. Scutellum yellow, the spines slightly darkened 

 towards the tips; the postscutelhmi black. Thorax with brownish. 

 below with whitish pubescence. Abdonien black with yellow spots, 

 siniilar to those in Meigenii. but less clubshaped and generally less 

 oblique. Venter black with more or less extended pale markings 

 on the second and third segments. Legs yellow. the coxæ and the 

 bases of the front femora black, tarsi with the last joints blackish. the 

 front tarsi not cornpressed. Wings yellowish with the anterior veins 

 brownish yellow. Halteres yellow, the peduncle slightly darker. 



Female. Eyes less hairy than in the male, but more densely 

 and longer haired than in the female of Meigenii, with a reddish band 

 in the middle. Front yellow with a black middle line : vertex black : 

 ttie hinder eye-margin yellow, white haired below. Thorax as in the 

 male, but the dorsal stripes generally larger and produeed a little 

 more backwards, and below the yellow postalar callus another yellow 

 spot on tlie nietapleura. The rest as in the male. 



Length 6.5 — 7 mm. 



This species is easily distinguished from the preceding by the 

 dorsal lines not being connecled with the humeral s|)ots. In the male 

 it is distinguished by the black cheeks and front, the latter only with 

 a yellow apical spot, and in the female by the quite yellow hinder 

 eye-margin and the yellow spot on the nietapleura; in both sexes it 

 is moreover characterised by the front tarsi being simple, not corn- 

 pressed. and not quite dark. and finally the species is smaller. 



O. Fallenii is, like the preceding one, very rare liere, I only know 

 of ten specimens taken in Denmark; Ordrup Mose (Stæger, Schlick), 

 Dyrehaven (Schlick) ; in Jutland in Vejle Norreskov (Schlick) and at 



