Ernestia. 491 



brownish, Thorax black, greyish pruinose, with three broad black 

 stripes, the median sometimes more or less divided into three; scu- 

 tellum more or less reddish at apex. Thorax black-haired; four post- 

 sutiiral dorsocentrals and two præ- and two postsutural acrostichals; 

 a præsutural intraalar bristle. Scutellum with five marginal bristles 

 on eacli side, the apical small, crossing. Abdomen black, shining, 

 sometimes slightly obscurely reddish at the sides on the front part 

 of the segments; third to fifth segment with a silvery pruinose front 

 band, shifting according to view; abdomen is black-haired, third 

 segment with a pair of discai and marginal bristles, fourth with a 

 pair of discai and a row of marginal; fifth segment with bristles on 

 hinder half. Fifth sternite cleft to base. Genitalia medium sized; 

 præhypopygial segment and hypopygium with bristly hairs behind; 

 upper> forceps triangular, outwards spine-shaped, incised in the upper 

 margin; arms of lower forceps somewhat triangular, considerably 

 shorter than upper. Legs black. Wings a little brownish tinged; 

 veins brown; discai angle with a short real veinlet; a somewhat large 

 costal spine. Squamulæ white. Halteres brownish yellow. 



Female. Similar; head often less silvery, more yellowish; frons 

 broader than the eye. Palpi more brown, Antennæ with third joint 

 a little smaller. Front tarsi simple. 



Length 7 to about 10 mm. 



E. truncata is not common in Denmark; Ordrup, Lundtofte, 

 Ruderhegn, Frerslev Hegn, Grib Skov, Sorø (Kryger, the author); 

 the dates are ^^/g — ^^Iq. The specimen from Ruderhegn is bred, it 

 developed in April, but no further elucidations are given. No host 

 seems to be known. 



Geographical distribution: — Northern and middle Europa; 

 towards the north to northern Scandinavia. 



2. E. vivida Zett. 



1838. Zett. Ins. Lapp. 642, 36 et 1844. Dipt. Scand. III, 1102, 99 et 1849. 

 VIII, 3243, 99 [Tachina). — 1862. Scliin. F. A. I, 451 (Nemoraea). — 1898. 

 Brauer, Sitzungsber. Akad, Wiss. Wien, CVII, 535, 7 {Erigone). — 1907. Kat. 

 palåarkt. Dipt. III, 215. — Tachina consobrina Zett. (nec Meig.) 1844. 1. c. 

 III, 1103, 100 et 1859. XIII, 6099, 100. — 1862. Schin. F. A. I, 451 {Nerm- 

 raea). — Nemoraea tessellans Egg. (nec R. D.) 1856. Verh. zool. bot. Geseli. 

 Wien, VI, 389. ■ — 1857. Schin. ibid. VII, 4. ■ — Platychira consobrina p. p. Stein, 

 Arch. f. Naturgesch. 90, 6, 52, 3. 



Male. Frons above not half as broad as the eye, rather protruding; 

 cheeks likewise not half as broad as the eye, and jowls not reaching 



