14 Orthorrhapha brachycera. 



V. trilineata Zett. Thorax with three stripes; abdoraen as above. 



V. palustris Meig. The dorsal stripes on thorax broad, with only 

 narrow yellow interstices. 



V. cinerea de Meij. Thorax, pleura and abdomen all dark. 



L. lutea is very comnion all over Denmark; it occurs in woods 

 and on nieadows on humid piaces, often at the horders of ditches 

 and lakes, and is hére found in low herbage in great numbers. It is 

 present in the greater part of the year, rny dates are ^'^/s — ^^/lo. The larva 

 has been found below reeds on Vesterfælled on ^^/n, in Dyrehaven at 

 the roots of water piants on ^*/i2, in Kuderhegn in flood refuse at 

 Skovrøddam on 'Vs, and likewise in Lyngby Mose and Darahusmosen 

 on ^/s and ^^'4, one of the latter developed in April (Schlick, Kryger); 

 a pupa was sifted from flood refuse at Skovrøddam on ^^/i, it deve- 

 loped on ^/2; another was found sitting on a dry leaf on the ground 

 in Ermelund on ^^'/4, it developed on ^^U (Kryger); further the pupa 

 has been found in flood refuse in fens on many various localities, but 

 they were always infested with parasitic Hymenoptera. The pale forms 

 of the species are most common with us, while the var. trilineata, 

 palustris and cinerea are less common, though not rare. 



Geographical distribution:— All Europe, towards the north to- 

 wards northern Sweden; probably it also occurs in North America. 



2. L. furcata Fall. 



1823. Fall. Dipt. Suec. Phytom. 1, p.p. [Dipsa). — 1906. De Meij. 

 Tijdschr. v. Entom. XLIX, 72, 2, PI. IV, Fig. 3, 7—9, PI. V, Fig. 23—25. 



— L. lutea 1824. Meig. p. p. Syst. Beschr. IV, 107. — 1862. Schin. p. p. 

 F. A. I, 243. — 1890. Stein, Wien. ent. Zeitg. IX, 110. — 1903. Kat. 

 palåarkt. Dipt. p. p. II, 353. — L. lamstris Meig. p. p. ?, 1824. 1. c. 107. 



— 1903. Kat. palåarkt. Dipt. p, p. II, 353. — L. riparia Meig. p. p. ^, 

 1824. 1. c. 108. — 1848. Zett. Dipt. Scand. VII, 2807, 5. — 1903. Kat. 

 palåarkt. Dipt. p. p. II, 353. — L. rivalis Meig. p. p. ?, 1824. 1. c. 108. 



— L. trilineata Zett. p.p. 1848, 1. c. 2804, 3. — 1903. Kat. palåarkt. 

 Dipt. p. p. II, 354. — L. impicta Zett. 1848. 1. c. 2806, 4. — 1903. Kat. 

 palåarkt. Dipt. II, 353. — L. cinerella Zett. 1838. Ins. Lapp. 792, 2 et 

 1848. 1. c. VII, 2808, 6. — 1903. Kat. palåarkt. Dipt. II, 352. 



Of this species I only know the female. It is very similar to 

 lutea and varies in the same way. Vertex and frons yellow, whitish 

 pruinose, dull ; the ocellar space dark and sometimes somewhat darkened 

 around it; vertical bristles yellow. Occiput more excavated above 

 than in lutea, yellow, sometimes grey just above, or more grey; post- 

 ocular bristles yellow, often some of the upper black. Of the oral 

 bristles the four anterior are black, the two posterior yellow; some- 

 times also the fifth is black. Antennæ black with the base yellow. 



