J6 Orthorrhapha brachycera. 



As seen tliis species is similar to the preceding and varies in the 

 same way; it is however known without difficulty; the male will be 

 known by the hypopygium, and both sexes nearly always by the 

 colour of the vertical bristles, the generally dark upper postocular 

 bristles, and the bristles on the anterior tibiæ ; besides the female has 

 not the front tibiæ darkened on the apical part. 



The varieties are: 



V. furcata Fall. Occiput yellow; thorax yellow or with a narrow 

 slripe; abdomen with a generally narrow stripe. 



V. rivalis Meig. Occiput somewhat darkened above; thorax with 

 a broader middle stripe; abdomen nearly quite dark. 



V. lacustris Meig. Thorax much darker, only narrow yellow side 

 stripes present. 



V. cinerella Zett. Body nearly all grey, also the pleura. 



L. furcata is like the preceding common in Denmark, and occur- 

 ring everywhere and on similar localities, often together with it, but 

 the male has never been taken here. My dates are ^'/s— ^^/lo. A pupa 

 was found sitting on the leaf of a turnip at Lyngby on ^°/st, it deve- 

 loped on ^^h (O. Rostrup); further the pupa has been sifted in very 

 great number from flood refuse in fens on various localities, but they 

 were always infested by parasitic Hymenoptera. The pale and darker 

 forms of the species seem to be about equally common in Denmark. 



Geographical distribution: — All Europe, towards the north to 

 northern Sweden, and also in North America. 



3. L. tristis Meig. 



1824. Meig. Syst. Beschr. IV, 110, Tab. XXXVI, Fig. 11. — 1862. 

 Schin. F. A. I, 244. — 1903. Kat. palåarkt. Dipt. II, 354. — 1906. De 

 Meij. Tijdschr. v. Entom. XLIX, 78, 3, PI. IV, Fig. 1, 10—12. — L. grisea 

 Gimmerlh. 1842. Bull. Soc. Imp. Nat. Mose. XV, 671. — 1903. Kat. palåarkt. 

 Dipt. II, 353. — L. fuscipennis Bohem. 1851. K. Vet. Akad. Handl. 1851, 

 207. — 1855. Zett. Dipt. Scand. XII, 4818, 9. — 1899. Bezzi, Bull. Soc. 

 Ent. Ital. XXX, 161. — 1903. Kat. palåarkt. Dipt. II, 353. 



Male. Vertex and frons blackish grey, shining; the inner vertical 

 bristles black, the outer dark yellow; epistoma grey. Occiput quite 

 grey, postocular bristles yellow. The oral bristles black, only the 

 seventh, quite behind the aperture, yellow. Antennæ black. Thorax 

 dark greyish brown or grey, slightly shining, generally a little paler 

 just at the humeri and in front of scutellum; scutellum dark with 

 the margin yellow; postscutellum dark grey. Pleura dark greyish 

 brown, a little paler in front and at the sutures. Abdomen dark grey. 



