342 Syrphidae. 



Table of Species. 



1. Thorax dull or dullish, the yellow side margin continuous 



to the scutellum 2. 



— Thorax shining, the yellow side margin interrupted at the 

 transverse furrow 3. 



2. Abdomen rather elongate, in the male longer than the 

 wings; scutellum quite or nearly quite yellow-haired ; hind 

 femora with a bare space at the base on the postero-ventral 

 side, and in the male the hairs crowded on the apical part 

 and here short and stubby on the posterior side; larger 



species 1 • scripta. 



— Abdomen less elongate, about of the length of the wings; 

 scutellum usually black-haired or mainly so; hind femora 

 without a bare postero-ventral space at the base, the hairs 



not crowded nor stubby and equally distributed 2. menthastri. 



3. Antennæ quite or mainly yellow 3. flavicauda. 



— Antennæ black 4. Loewii. 



1. S. scripta L. 



1758. Linn. Syst. Nat. X, 594 et 1761. Fn. Suec. 1820 et 1767. Syst. 

 Nat. XII. 2, 987, 54 {Musca). — 1764. O. F. Mull. Fn. Fridrichsd. 723 

 {Musca). — 1775. Fabr. Syst. Entom. 772,45 (Syrphus) et 1805. Syst. Antl. 

 252, 17 (Scaeva). — 1822. Meig. Syst. Beschr. III, 324, 73 {Syrphus). — 

 1843. Zett. Dipt. Scand. II, 766, 1 et 1849. VIII, 3157, 1. — 1862. Schin. 

 F. A. I, 316 {Melithreptus). — 1901. Verr. Brit. Fl. VIII, 428, 1, figs. 

 311—314. — 1907. Kat. palåarkt. Dipt. III, 76. 



var. dispar Loew, 1840. Programm Posen, 37, 5, Fig. 53 — 54 et Isis 

 1840. 573, 5 (Melithreptus). — 1843. Zett. Dipt. Scand. II, 767 p.p. var. b. 

 et 1849. VIII, 3157,1—2. — 1862. Schin. F. A. I, 317 {Melithreptus). 



var. nigricoxa Zett. 1843. Dipt. Scand. II, 767, 2 et 1849. VIII, 3158, 2. 



var, strigata Stæg. 1845. Naturh. Tidsskr. 2, I, 362. — 1849. Zett. 

 Dipt. Scand. VIII, 3159, 2—3. — 1862. Schin. F. A. I. 316 {Melithreptus). 



Male. Vertex triangular; frons and epistoma yellow, shining, the 

 front rnouth edge darkened, and sometimes the central knob, or a 

 narrow middle line more or less darkened. Jowls yellow. Vertex 

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

 epistoma with slight, pale hairs. Occiput greyish pruinose, the hairs 

 whitish below, about the middle rather coarse and somewhat silvery, 

 yellow above. Antennæ yellow, third joint generally more or less 

 darkened above; arista brown. Thorax dull æneous, in front there 

 are two approximated, faint greyish stripes, separated and inclosed 

 by three narrow, darker, dull lines; at each side is a somewhat broad, 

 yellow line from the humerus to scutellum, it is clearest yellow 

 anterior to the transverse furrow, just above the wing-root is a 

 blackish spot; the thorax is clothed with yelloAv or brownish yellow 



