Lydella. 299 



L. albisquama is rare in Denmark, only three specimens, all 

 females, have been taken, one on Lolland in Merrits Skov (Schlick), 

 one at Strandby (L. Jørgensen) and one in Jutland at Bevtoft 

 (Wiistnei); the dates are 1^/7 — ^/g. The species is known as parasite 

 on Metopsilus parcellus, Notodonta trepida and Ammoconia caeci- 

 macula. 



Geographical distribution : — Europe down into France ; towards 

 the north to middle Sweden. 



3. L. nigripes Fall. 



1820. Fall. Dipt. Suec. Muse. 13, 24 (Tachina). — 1824. Meig. Syst. 

 Beschr. IV, 357, 205 et 1838. VII, 191, 55 (Tachina). — 1838. Zett. Ins. Lapp. 

 636, 12 et 1844. Dipt. Scand. III, 1058, 52 et 1849. VIII, 3233, 52 et 1859. 

 XIII, 6085, 52 {Tachina). — 1862. Schin. F. A. I, 480 (Tachina). — 1907. 

 Kat. palåarkt. Dipt. III, 290. — 1921. Baer, Zeitschr. f. angew. Ent. VII, 156. 

 — ■ 1924. Stein, Arch. f. Naturgesch. 90, 6, 96, 6 (Ceromasia). — • Dexodes ma- 

 chaeropsis B. B. 1889. Denkschr. Akad. Wiss. Wien, LVI, 87 et 1891. LVIII, 

 316. — Tachina ignota (Perris) Pand. 1896. Eev. Entom. XV, 51, 3. — 1900. 

 Villen. Bull. Soc. Ent. de Fr. 402, 8 et 1907. Ann. Soc. Ent. de Fr. LXXVI, 

 388. 



Male. Frons above about one half to two thirds as broad as the 

 eye, only somewhat protruding. Gheeks almost not narrowing down- 

 wards; jowls about one third of the height of the eye. Orbits greyish 

 or yellowish grey, black just above, cheeks and jowls silvery whitish 

 grey; frontal stripe velvet black. Weak outer vertical bristles present. 

 Frontal bristles descending to or to about insertion of arista. Vibrissæ 

 ascending but not reaching middle. Orbits with short, jowls with 

 longer black hairs. Occiput somewhat puffed out below and the eye- 

 margin a little broadened downwards; it is grey with pale yellow 

 hairs and a row of black hairs behind postocular bristles. Antennæ 

 black, second joint twice as long as third; arista thickened in basal 

 third, second joint distinct but not elongated. Palpi thin, black. 

 Thorax black and somewhat shining, thinly bluish grey pruinose, 

 whitish grey in front and at the sides; there are four black stripes, 

 the median abbreviated behind; scutellum bluish black. Thorax 

 black-haired, hairs on scutellum strong; three postsutural dorso- 

 centrals and three præ- and three postsutural acrostichals. Scutellum 

 with three marginal bristles on each side, the apical wanting or present 

 as very small hairs. Three sternopleural bristles. Abdomen elongated 

 conical, black and shining, generally with reddish side spots on third, 



