[Monochaeta. 287 



Behind postocular bristles rows of black hairs. Frontal bristles reaching 

 to the end of second antennal joint, two uppermost reclinate in both 

 sexes. Cheeks bare. The vibrissal ridges strongly raised as in Bavaria; 

 vibrissæ sliglitly ascending, at most to one third of the height. Eyes 

 hairy. Antennæ inserted high above middle of the eye, third joint 

 large and long, five to six times as long as second. Thorax with three 

 postsutural dorsocentrals, and three præ- and postsutural acrosti- 

 chals; a præsutural intraalar bristle. Scutellum with three marginal 

 bristles on each side, the middle pair strong; no crossing apical 

 bristles; a pair of erect discai bristles before the apex. Three sterno- 

 pleural bristles. Abdomen with discai and marginal bristles, on second 

 segment a pair of marginal. Legs with the anterodorsal bristles on 

 hind tibiæ not forming any pronounced row; claws and pulvilli in 

 male very slightly or almost not elongated; front tarsi in female 

 simple. Wings with first posterior cell narrowly open, ending rather 

 near apex of wing; a small costai spine. 



The species belongs to Pantel's group 2 (Thompson 1924, but 

 no host is here recorded; see below). 



Only one species is known, also occurring in Denmark. 



1. M. albicans Fall. 



1810. Fall. Vet. Acad. Handl. XXXI, 270 et 1820. Dipt. Suec. Muse. 

 37, 74 {Tachina). — 1824. Meig. Syst. Beschr. IV, 415, 306 {Tachina) et 1838. 

 VII, 256, 37 (Exorista). — 1844. Zett. Dipt. Scand. III, 1134, 132 et 1859. 

 XIII, 6120, 132 {Tachina). — 1862. Schin. F, A. I, 467 {Exorista). — 1893. 

 B. B. Denkschr. Akad. Wiss. Wien, LX, 219. — 1907. Kat. palåarkt. Dipt. 

 III, 356. — 1921. Baer, Zeitschr. f. angew. Ent. VII, 360. — 1924. Stein, 

 Arch. f. Naturgesch. 90, 6, 116. — Tachina leucophaea Meig. 1824. 1. c. IV, 

 414, 304 et 1838. VII, 256, 35 {Exorista). ^ 1844. Zett. 1. c. III, 1191, Obs. 

 {Tachina). — 1889. B. B. 1. c. LVI, 131, Tab. IX, Fig. 225. — Tachina fer- 

 turbans Zett. 1844. 1. c. III, 1135, 133. — 1862. Schin. F. A. I, 468 {Exorista). 

 — 1896. Pand. Eev. Entom., XV, 11, 12 {Exorista). — 1907. Villen. Ann. Soc. 

 Ent. de Fr. LXXVI, 385. — Tachina schistacea Meig. 1824. 1. c. IV, 414, 305. 



Male. Frons above broad, much broader than the eye. Orbits 

 varying from yellowish brown to dark greyish, cheeks and jowls 

 from yellowish to whitish grey ; frontal stripe velvet black or brownish 

 black. Frontal bristles not numerous. Orbits and jowls with black 

 hairs. Occiput grey or yellowish grey, with pale hairs almost only 

 below, above with rows of black hairs. Eyes with pale hairs. Antennæ 

 black, second joint short, third large and long; arista thickened in 

 basal half. Palpi yellow. Thorax varying from brown to grey pruinose. 



