530 Tachinidae. 



a little dilated apically. Antennæ inserted about at middle of the 

 eye, third joint about twice as long as second; arista qiiite short- 

 pubescent, second joint short. Thorax rectangular; three postsutural 

 dorsocentrals and two præ- and only præscutellar postsutural acrosti- 

 chals; no præsutural intraalar bristle; one posthumeral bristle, Scu- 

 tellum with three marginal bristles on each side, the lateral small, 

 and with or without small apical hairs. Three sternopleural bristles. 

 Pteropleura above with small hairs and a bristle. Abdomen elongated, 

 cylindrical, somewhat tapering, excavation on second segment not 

 reaching hind margin; there are discai and marginal bristles, second 

 segment without bristles; fifth segment with a row of discai and 

 marginal bristles. Genitalia not protruding; fifth sternite cleft to 

 base. Legs long and rather slender; claws and pulvilli in male elong- 

 ated, but not much. Wings with first posterior cell narrowly open, 

 ending somewhat before apex of wing; discai angle obtuse; subcostal, 

 cubital and postical vein with bristles; a somewhat long costal spine 

 and anterior to it costa strongly haired, almost spinulose. 



Of the genus there is, besides the well known spreta, also occurring 

 in Denmark, recorded still a species, piidica R. D. from France. 



1. B. spreta Meig. 



1824. Meig. Syst. Beschr. IV, 343, 179 {Tachina) et 1838. VII, 236, 3 

 (Myiobia). — 1862. Schin. F. A. I, 434 (Demoticus). — 1900. Stein, Ent. Nach- 

 richt. XXVI, 149. — 1907. Kat. palåarkt. Dipt. III, 416. — 1924. Stein, Arch. 

 f. Naturgesch. 90, 6, 165. — T. jrontata Bohem. Vet. Acad. Handl. 1852, 200. 



— 1855. Zett. Dipt. Scand. XII, 4690, 24—25. — 1862. Schin. F. A. I, 434 

 {Demoticus). — 1889. B. B. Denkschr. Akad. Wiss. Wien, LVI, 135, Tab. X, 

 Fig. 257 {Hystrichoneura). — 1896. Pand. Rev. Entom. XV, 101, 3 {Peteina). 



— 1907. Villen. Ann. Soc. Ent. de Fr. LXXVI, 390. 



Male. Frons as broad as the eye or fully; cheeks broad. Head 

 silvery; frontal stripe brownish black, seen from in front whitish 

 pruinose. Orbits and jowls with fme black hairs. Occiput grey, with 

 black hairs above, white in the middle and below. Antennæ black, 

 second joint sometimes somewhat reddish; arista thickened in about 

 basal third, very short-pubescent. Palpi yellowish to brownish. Thorax 

 grey or yellowish grey pruinose, with four darker grey stripes as in 

 Demoticus\ it is black-haired. Abdomen blackish, with smaller or 

 larger, generally rather large reddish yellow side spots, going over 

 second and third segment; it is greyish white pruinose, shifting with 

 dark tessellations according to view; hind margins not pruinose and 



