Lydella. 297 



and a half times as long as second; arista short, thickened in basal 

 half, second joint distinct but not elongated. Palpi thin, yellow. 

 Thorax bluish black, shining, thinly greyish pruinose, more distinctly 

 in front and at the sides; it has four black stripes, evanescent behind; 

 scutellum dark. Thorax black-haired ; three postsutural dorsocentrals, 

 and two præ- and three postsutural acrostichals ; no præsutural 

 intraalar bristle. Scutellum with three marginal bristles on each side, 

 and a pair of very small crossing apical hairs. Three (or four) sterno- 

 pleural bristles. Abdomen black, shining, the three last segments 

 with a whitish pruinose band on front half, shifting with brown 

 tessellations according to view; the bands are interrupted in the 

 middle so that a broad black middle stripe occurs; excavation on 

 second segment not reaching hind margin. Abdomen black-haired, 

 second segment with a pair of marginal bristles, third with a pair 

 of discai and marginal and fourth with a pair of discai and a some- 

 what irregular row of marginal bristles. Legs black. Wings somewhat 

 brownish tinged, especially along the veins, the latter blackish brown; 

 discai angle about rectangular, apical cross-vein a little incurved 

 just above it, for the rest straight, rather sloping; first posterior cell 

 open ending in some distance from apex of wing; costal spine large; 

 cubital vein with bristles at base and with a few single stretching to or 

 beyond half way to medial cross-vein. Squamulæ white. Halteres brown. 



Female. Similar; frons about as broad as the eye; upper frontal 

 bristle transverse. 



Length. About 9 mm. 



L. angelicae is rare in Denmark, I know only four specimens, 

 two males and two females, taken in Merrits Skov on Lolland (Schlick), 

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

 borg (Wiistnei); the dates are in July. The species is recorded bred 

 from Tortrix viridana. 



Geographical distribution: — Europe; towards the north in 

 Lapland. 



Remarks : In our general collection there is a specimen of T. fu- 

 tilis Zett., sent from Zetterstedt to Stæger; an examination proved 

 it to be the present species, and the description is also in accordance 

 herewith. 



2. L. albisquama Zett. 



1844. Zett. Dipt. Scand. III, 1037, 27 et 1859. XIII, 6081, 27 {Tachina). — 

 1862. Schin. F. A. I, 480 {Tachina). — 1907. Kat. palåarkt. Dipt. III, 288. -- 



