Ernestia. 501 



broad at base, almost rectangularly curved in the middle of outer 

 margin, attenuating towards apex and here bifid; they are longer 

 than upper forceps; the anterior part of the scale-hke piece and 

 the outer surface of the arms have long and strong hairs. Legs black, 

 bristles strong. Wings slightly tinged or nearly hyaline; veins black, 

 medial cross-vein sometimes a little infuscated; discai angle without 

 veinlet. Squamulæ white. Halteres dark. 



Female. Similar; frons as broad as the eye. Third and fourth 

 abdominal segment generally with two pairs of discai bristles. Front 

 tarsi with the three last joints dilated, and also second joint slightly 

 broadened. 



Length 10 — 11 mm. 



E. caesia is not common in Denmark; Lundtofte; on Funen at 

 Strib; in Jutland at Kjeldstrup (Wiistnei), in Nørholm Skov at 

 Varde (Kryger) and at Stenege south of Aarhus; on Bornholm at 

 Balka (Weis); the dates are in June and July. The species was hitherto 

 known as parasitic on Dianthoecia caesia; my specimens from Stenege 

 are labelled as bred from D. capsincola, other specimens from D. car- 

 pophaga and sp. and one from Tryphaena pronuba. 



Geographical distribution: — Northern and middle Europe 

 down into France ; towards the north to northern Sweden and Lapland. 



7. E. nemorum Meig. 



1824. Meig. Syst. Beschr. IV, 251, 20 {Tachina) et 1838. VII, 221, 21 

 (Nemoraea). — 1844. Zett. Dipt. Scand. III, 1091, 87 (Tachina). — 1862. 

 Schin. F. A. I, 454 (Nemoraea). — 1896. Pand. Eev. Entom. XV, 37, 12 (Eri- 

 gone). — 1907. Kat. palåarkt. Dipt. III, 213. — 1907. Villen. Wien. Ent. Zeitg. 

 XXXVI, 263 (Platychira) et 1907. Ann. Soc. Ent. de Fr. LXXVI, 388 (Erigone). 

 — 1924. Stein, Arch. f. Naturgesch. 90, 6, 53 (Fausta). — T. ignohilis Meig. 

 1824. 1. c. IV, 264, 42 et 1838. VII, 221, 19 (Nemoraea). — Echinosoma pecti- 

 nata Girsch. 1881. Entom. Nachricht. VII, 277, 1, Fig. 1 et 1898. Wien. Ent. 

 Zeitg. XVII, 151, 1. — 1893. B. B. Denkschr. Akad. Wiss. Wien, LX, 223. — 

 1898. Brauer, Sitzungsber. Akad. Wiss. Wien, CVII, 531, 2 (Eurythia). 



Male. Frons above about as broad as the eye, rather protruding; 

 cheeks of about the same breadth, and jowls almost as broad as the 

 eye is high. Orbits greyish to black; cheeks yellowish white, dark 

 in certain views, epistoma somewhat yellowish; frontal stripe velvet 

 brownish black. Weak outer vertical bristles present. Frontal bristles 

 reaching below insertion of antennæ. Orbits black-haired; jowls 

 with longer black hairs. Occiput grey, with yellowish hairs and rows 

 of black hairs behind postocular bristles. Eyes with pale brownish 



