Eriothrix. 523 



Wings With first posterior cell narrowly open, ending considerably 

 hefore apex of wing; discai angle obtuse; cubital vein with bristles 

 stretching more or less near to medial cross- vein; a costal spine present. 

 Of the genus 4 palæarctic species are recorded, one occurring 

 in Denmark; the other three are more southern. 



1. A. longirostris Meig. 



1824. Meig. Syst. Beschr. IV, 315, 132 (TacJima) et 1838. VII, 266, 1, 

 Tab. LXIII, Fig. 1—6 {Olivieria). — 1849. Zett. Dipt. Scand. VIII, 3228, 

 25—26 et 1859. XIII, 6080, 25—26 {Tachina). — 1862. Schin. F. A. I, 432. 



— 1889. B. B. Denkschr. Akad. Wiss. Wien, LVI, 134, Tab. X, Fig. 250. — 

 1896. Pand. Rev. Entom. XV, 68, 3. — 1907. Kat. palåarkt. Dipt. III, 417. 



— 1924. Stein, Arch. f. Naturgesch. 90, 6, 165. 



Male. Frons about as broad as the eye. Head silvery; frontal 

 stripe brown. Orbits with fme black hairs; jowls only haired below 

 and behind. Occiput grey, with whitish hairs and a row of black 

 hairs behind postocular bristles. Antennæ black, second joint generally 

 a little pale; arista thickened in basal half. Palpi yellow. Thorax 

 black, bluish grey pruinose, with four black stripes, the median 

 narrow, abbreviated behind, the lateral interrupted at the suture. 

 Thorax black-haired. Abdomen black and somewhat shining, with 

 large, yellowish red side spots going over second, third and base of 

 fourth segment; the three last segments with a greyish or yellowish 

 grey pruinose front band, a little triangularly dilated in the middle. 

 Abdomen black-haired, with marginal bristles; second segment 

 without bristles, third with a pair and fourth with a row. Legs black. 

 Wings slightly tinged; veins blackish brown; discai angle more or 

 less rounded. Squamulæ dirty whitish. Halteres yellow. 



Female. Quite similar; frons a little broader. 



Length 6,5 — 7,5 mm. 



A. longirostris is rare in Denmark; Tisvilde, Høbjerg near Ros- 

 kilde (Kryger), in Jutland at Blans, and on Bornholm at Rønne 

 (Schlick); the dates are ^^U—^^l-,. 



Geographical distribution: — Europe; towards the north to 

 southern Sweden, but rare. 



126. EriotllPlx Meig. 



Elongated species of black colour with slight pruinosity, and 

 with red spots on sides of abdomen. Head fully as broad as thorax, 



