Lydina. 403 



broad as the height of the eye. In both sexes erect, diverging ocellar 

 bristles, strong inner and weaker outer vertical, and in female two 

 orbital bristles. Postocellar and occipital bristles present. Behind 

 postocular bristles rows of black hairs. Frontal bristles descending 

 to the middle of cheeks, two iippermost reclinate in both sexes. 

 Orbits and upper part of cheeks with partly bristly hairs, cheeks for 

 the rest bare; jowls with black hairs. Vibrissæ not ascending, only 

 a few hairs above the large vibrissa; oral bristles well developed. 

 Eyes hairy. Oral cone and proboscis somewhat short; palpi rod-like. 

 Antennæ insertcd above middle of the eye, third joint fully twice 

 as long as second; arista with second joint somewhat elongafced. 

 Thorax rectangular; three postsutural dorsocentrals, and three præ- 

 and three postsutural acrostichals; no præsutural intraalar bristle. 

 Scutellum somewhat triangular, a little pointed, with four marginal 

 bristles on each side, the apical quite small, crossing. Three sterno- 

 pleural bristles. Pteropleura with a long bristle above. Abdomen 

 ovate, excavation on second segment reaching hind margin; there 

 are discai and marginal bristles; second segment without bristles; 

 fifth with two rows. Genitalia somewhat small, upper and lower 

 forceps of the same length. Legs a little strong; claws and pulvilli 

 not elongated in male; in female the front tarsi long and diiated, but 

 the diiated joints not short. Wings with first posterior cell closed or 

 very narrowly open quite near apex of wing; discai angle rounded, with- 

 out veinlet; cubital vein with some distinct bristles at base, stretching 

 towards medial cross- vein; a small costal spine. 



The species belongs to Pantel's group 4 (Thompson 1923). 



Only one sure species is known, also occurring in Denmark. 



1. L. aenea Meig. 



1824. Meig. Syst. Beschr. IV, 273, 60, ? {Tachina) et 1838. VII, 260, 3, 

 Tab. LXII, Fig. 22 (Harrisia). — 1838. Zett. Ins. Lapp. 647, 55 et 1844. Dipt. 

 Scand. III, 1154, 153 et 1849. VIII, 3246, 153 et 1859. XIII, 6130, 153 {Tachina). 

 — 1862. Schin. F. A. I, 526 (Polidea). — 1891. B. B. Denkschr. Akad. Wiss. 

 Wien, LVIII, 421 (Somoleia). — 1907. Kat. palåarkt. Dipt. III, 222. — 1924. 

 Stein, Arch. f. Naturgesch. 90, 6, 55. — Tachina crassitarsis Zett. 1838. 1. c. 

 647, 56 et 1844. 1. c. III, 1155, 154. — Tachina simplicitarsis Zett. 1838. Ins. 

 Lapp. 647, 57 et 1844. Dipt. Scand. III, 1155, 155 et 1849. VIII, 3247, 155 et 

 1859. XIII, 6131, 155. 



Male. Frons about one and a half times as broad as the eye, 

 with the orbits broad; cheeks not half as broad as the eye. Orbits 

 and upper part of cheeks bluish, shining, lower part of cheeks greyish; 



26* 



