242 Syrphidae. 



et 1805. Syst. Antl. 241, 37 (Eristalis). — 1822. Meig. Syst. Beschr. III, 



313, 58, Tab. XXX, Fig. 27 {Syrphus). — 1843. Zett. Dipt. Scand. II, 778, 1 

 et 1859. XIII, 6012, 1 {Eristalis). — 1862. Schin. F. A. I, 299. — 1901. 

 Verr. Brit. Fl. VIII, 319. 1. — 1907. Kat. palåarkt. Dipt. III, 52. — Syrphus 

 asiliformis Fabr. 1776. Gen. Ins. 306, 18—19 et 1781. Spec. Ins. II, 426,24 

 et 1805. Syst. Antl. 241, 36 {Eristalis). — 1822. Meig. Syst. Beschr. III, 



314, 59. 



Male. Frons greyish pruinose; epistoma yellow and yellowish 

 pruinose, but the middle line undusted, black and shining; also the 

 Iower hinder side parts of epistoma black, shining; jowls grey. Vertex 

 with yellow, anteriorly with black hairs, frons black-haired; epistoma 

 with yellow hairs at the sides. The Iower part of epistoma with the 

 central knob rather protruding and the lateral mouth edges somewhat 

 descending. Occiput grey pruinose, with yellow hairs, above besides 

 a row of longer, black hairs, overhanging the eyes. Eyes densely and 

 longish hairy with black hairs, paler on the Iower part. Antennæ 



Fig. 111. Antenna of L. lucoriim c?, from the inside. X 55. 



black, somewhat long, third joint oval, longer than broad ; arista fully 

 as long as the antennæ, very inconspicuously pubescent. Thorax dull 

 æneous, with three narrow, darker stripes, the median abbreviated 

 about the middle, and sometimes indistinct. Scutellum yellow, only a 

 little dark at the basal corners. Thorax clothed with erect, reddish 

 yellow hairs, longest behind and on scutellum. Pleura bluish æneous 

 with pale hairs. Abdomen not long, ovate, broader than thorax; the 

 small first segment grey, the second yellow or whitish yellow with a 

 broader or narrower, black middle line, often abbreviated behind; 

 sometimes the line is much expanded so that the segment has only 

 yellowish side spots, and then the line is often greyish; third segment 

 bluish black, mostly dull; it is either quite black or just the basal 

 margin yellow, or this colour widens to a pair of smaller or larger 

 spots connected with the second segment; the rest of abdomen is 



