oO Ortlionhapha bracliyceva. 



yellow with a blackish ring in the iniddle; tarsi yellow, darkened 

 towards tiie ends. Feniora with long, ciiiefly brownish hairs, tibiæ 

 short haired. Wings hyaiine with blackish veins, cubital vein forked, 

 the tirst of the veins, rising from the discai cell, very indistinct, the 

 (hird wanting. Halteres yellow with brown peduncle. 



Female. Eyes very sparingly and slioit hairy, with a bluish band 

 a little above the middle. Front and face black, greyish haired, the 

 haiis fornilng a small spot on each side at the eye-margin behind the 

 antennæ just in front of a |)air of sligtlily elevated, shining tubercles; 



Fig. 18. Wing of O. tigrina. 



front with an inipressed middle line; hinder eye-niargin with white, 

 shining pubescence. Thorax on the disc with short, depressed, greyish 

 white shining pubescence. Pubescence on abdomen greyish. 



Length 7,5 — 10,5 mm. 



The larva is lighter or darker brown, sometinies almost black, 

 with some, often indistinct, longitudinally arranged darker markings; 

 it is rather densely, short haired on both surfaces; it has forwards 

 curved spines on the hind margin of the ventral side of the seventh 

 abdominal segment. When full grown its length is about Iti nnn. 



O. tigrina is comnion in Denmark in localities near water, where 

 it occurs in rushes and low herbage; Damhusmosen, Utterslev Mose. 

 Vangede Mose at Gentofte, Ernielund, Dyrehaven. Ruderhegn, Furesø, 

 Lillerød, Hillerød, at Frederikssund and Roskilde; Lolland in Nørreskov 

 at Maribo and at Ryde. and Funen at Assens. It is an early species, 

 jny dates are '-'*■. — '"/v. The larvæ and pupæ have been taken in 

 water and flood refuse in Damhusmosen, Utterslev Mose, Furesø and 

 several other localities on '-U — -'■'.., they develoi)ed to '"'d. 



Geographical distribution : — Common in the northern and middle 

 Europe from middle Sweden down into France. 



2. O. argentata Fabr. 

 1794. Stratiomys, Fabr. Eiit. Syst. iV. 266, 15. — 1842. Stratiomys, 

 Zelt. Dipl. Scand. 1, 137. 6. — 1844. Stratiomys. Schiødte, Nat. Tidsskr."2. 

 I, 40. — 1846. Loew. Linn. Entom. I, 476, 5. - 1862. Schin. F. A. I. 20. 

 — 1903. Kat. paliiarkt. Dipl. IL 23. 



.Male. Eyes bare, facets in about the lovver fourth part .smaller 

 than in Ihe larger uppor pari. the dividing line rather sharj); colour 



