Eriozona. 245 



1. E. syrphoides Fall. 



1817. Fa]l. Dipt. Suec. Syrph. 36, 1 (Scaeva). - 1843. Zett. Dipt. 

 Scand. II, 699, 1 (Scaeva). — 1862. Schin. F. A. I, 300. — 1907. Kat. palåarkt. 

 Dipt. III, 53. — Syrphus oestriformis Meig. 1822. Syst. Beschr. III, 315,60 

 €t 1838. VII, 131, 60. 



Male. Frons greyish pruinose ; epistoma yellow, somewhat shining, 

 the lower hind corners and the jowls blackish. Vertex with yellow, 

 on the front part with black hairs; frons and epistoma with yellow 

 hairs. Epistoma with a slightly protruding central knob; the mouth 

 edge retreating; the lateral mouth edges and the jowls almost not 

 descending. Occiput grey pruinose, the hairs all yellow or some few 

 black hairs above. Eyes hairy with not long, pale hairs. Antennæ 

 black, porrected, somewhat long, third joint considerably longer thari 



I 



Fig. 112. Antenna of E. syrphoides <J, from the inside. X 55. 



the two basal together; arista brown, palest at the base. Thorax 

 black, rather duU, with three more or less distinct, darker and duller 

 stripes, the median abbreviated about the middle; thorax clothed with 

 erect, black hairs, more or less yellow on the front part and posteriorly 

 just in front of scutellum. Scutellum greyish yellow, with yellow 

 hairs, longer than those on thorax and longest towards the margin. 

 Pleura black-haired, but the humeri with long, yellow hairs, distinctly 

 seen from above as yellow tufts. Abdomen duU black, greyish at the 

 base, the apex from the middle of fourth segment reddish ; it is densely 

 clothed with longish, erect hairs which mainly follow the ground 

 colour and thus are pale at the base, black on the middle and reddish 

 on apex and here longest. Venter coloured and haired chiefly as 

 dorsum. Genitalia reddish yellow. Legs with the femora black or 

 brownish black, the apical part of anterior femora yellowish; anterior 

 tibiæ yellowish with a more or less distinct, blackish ring near the 

 apex, hind tibiæ black, generally indistinctly pale on the basal half, 



