428 Syrphidae. 



plumose arista in common, it is at once distinguished by the colour 

 of the pile and of the legs. 



E. oestraceus is very rare in Denmark, we have only two speci- 

 niens, a male and a female, in Westermann's collection, labelled Siel- 

 land, August 1825. 



Geographical distribution: — Europe down into Austria; towards 

 the north to middle Sweden. 



Remarks: As remarked under Chilosia illustrata it has been 

 proved that the present species is oestraceus Linn. (Haliday 1. c); it 

 was also mentioned there that oestraceus of Fabricius does not belong 

 here, as thought by Verrall and foUowed in Kat. palåarkt. Dipt., but 

 likewise to C. illustrata so that I have excluded it from the synonymy 

 of the present species. Musca oestracea in the papers of Kramer and 

 O. F. Miiller is no doubt not this species, but probably the common 



E. intricarius. 



8. E. intricarius L. 



1758. Linn. Syst. Nat. X, 592 et 1767. XII, .2, 955, 33 et 1761. Fn. 

 Suec. 1800 {Musca). — 1775. Fabr. Syst. Entom. 766,17 {Syrphus) et 1805. 

 Syst. Antl. 232, 3. — 1817. Fall. Dipt. Suec. Syrph. 23. 12 {Syrphus). — 

 1822. Meig. Syst. Beschr. III, 391, 12. — 1843. Zett. Dipt. Scand. II, 654, 1 

 et 1855. XII, 4650, 1 et 1859. XIII, 5079, 1 {Syrphus). — 1862. Schin. 



F. A. I, 334. — 1901. Verr.Brit. Fl. VIII, 508, 5. — 1907. Kat. palåarkt. 

 Dipt. III, 104. — Syrphus hombyliformis Fabr. 1794. Ent. Syst. IV, 281, 13 

 et 1805. Syst. Antl. 227, 12. 



Velvet pilose species. Male. Vertex brownish pruinose; frons 

 and epistoma black, rather thinly brownish pruinose, a somewhat 

 broad median stripe not reaching the antennæ, the mouth edge and 

 the lower lateral parts black; jowls black. Vertex and frons with 

 reddish yellow hairs, epistoma with the hairs erect, varying from 

 black to brownish yellow. Epistoma a little hoUowed below the 

 antennæ, then somewhat straight down to the slightly protruding cen- 

 tral knob but below it considerably retreating and a little descending. 

 Occiput silvery pruinose along the eye-margin below, brownish above 

 and with a reddish spot above the middle; the hairs black below, 

 yellow above. Eyes black-haired, most densely along the middle. 

 Antennæ black or brownish black, third joint brownish or pale brown, 

 it has the upper front corner rounded; arista brown, plumose on the 

 basal half. Thorax brownish black, dull, very densely clothed with 

 long, reddish yellow hairs, only black just at the sides behind; scutel- 

 lum yellow or brownish yellow, with similar hairs as on thorax. 

 Pleura with long, black or brownish black hairs. Abdomen black, 

 dull on the basal half, somewhat shining on the apical half, with 



