Exorista. 323 



bristles in which one or more longer bristles; claws and pulvilli only 

 slightly elongated. Wings a little brownish tinged; veins brown; first 

 posterior cell very narrowly open or almost closed, ending considerably 

 before apex of wing; discai angle a little obtuse; apical cross- vein nearly 

 straight. Squamulæ white. Halteres brown witli the peduncle paler. 



Female. Similar; frons much broader than the eye. 



Length. About 5 to fully 7 mm. 



E. fimbriata is not just common in Denmark; Ordrup, Char- 

 lottenlund (Stæger), Dyrehaven (the author), Ørholm, Ruderhegn, 

 Jægerpris (Kryger); on Lolland in Kældskov (L. Jørgensen); on 

 Funen at HofTmansgave (H. J. Hansen), and in Jutland at Sønder- 

 borg, Madeskov, Høruphav (Wiistnei), Varde (Kryger) and Silke- 

 borg (Esben-Petersen); the dates are ^^/j — ^^/g. It is known as bred 

 from Thamnonoma wauaria and the Tenthredinid Pteronidea oli- 

 gospila and from the non Danish Thalpochares rosea and the Tentredi- 

 nid Pseudoclavellaria amerinae. 



Geographical distribution: — Europe; towards the north to 

 northern Scandinavia. 



11. E. hirtipilis Pand. 



1896. Pand. Rev. Entoni. XV, 12, 13. — 1907. Kat. palåarkt. Dipt. HI, 

 244. — E. nemestrina Rond. (iiec Meig.) 1859. Dipt. Ital. Prodr. HI, 146, 36. 

 -- 1924. Stein, Arch. f. Naturgesch. 90, 6, 79, 18. 



Of this species I know only the female; the species is similar 

 to fimbriata. Frons scarcely as broad as the eye; orbits not as broad 

 as frontal stripe; jowls very narrow and almost not descending. 

 Orbits grey above, downwards together with cheeks silvery. Frontal 

 bristles descending at most to end of second antennal joint, the two 

 upper reclinate. Antennæ with third joint not twice as long as second, 

 Palpi black. Thorax as in fimbriata; scutellum with the hairs rather 

 long and strong and with only three marginal bristles on each side, 

 the apical crossing. Three sternopleural bristles. Abdomen elongated 

 conical, coloured as in fimbriata, but the white bands narrower and 

 fifth segment quite black; hairs on abdomen depressed. There are 

 discai and marginal bristles, of the latter no distinct on second seg- 

 ment, a pair on third arid a row on fourth; the discai bristles a pair 

 on third and fourth segment, but not strong and somewhat irregular. 

 Legs as in fimbriata. Wings a little brownish tinged; veins brown; 

 first posterior cell narrowly open, ending quite near apex of wing; 

 discai angle about rectangular. 



21* 



