124 Tachinidae. 



Table of Species. 



1 . Scutellum with three marginal bristles on each side .... 1 . hrassicaria. 



— Scutellum with one or two marginal bristles on each side 2. 



2. Scutellum with two marginal bristles on each side, the 



apical and subapical 2. auriæps. 



— Scutellum with only one, the subapical bristle on each 



side, the apical wanting 3. interrwpta. 



1. O. brassicaria Fabr. 



1775. Fabr. Syst. Entom. 877, 25 {Musca) et 1805. Syst. Antl. 312, 1. 



— 1820. Fall. Dipt. Suec. Khizom. 5, 1. ^ 1821. Meig. Syst. Beschr. IV, 

 211, 2, Tab. XXXIX, Fig. 29. — 1811. Loew, Stet. Ent. Zeitg. V, 234, 1 et 

 1845. VI. 180, 1. — 1814. Zett. Dipt. Scand. III, 1220, 1 et 1859. XIII, 

 6158, 1. — 1862. Schin. F. A. I, 416. — 1894. Pand. Kev. Entom. XIII, 61, 5. 



— 1903. Villen. Wien. Ent. Zeitg. XXII, 39, V, 40, 7. — 1907. Kat. palåarkt. 

 Dipt. III, 430. — 1921. Baer, Zeitschr. f. angew. Entom. VII, 377. — 1924. 

 Stein, Arch. f. Naturgesch. 90, 6, 174, 3. 



Male. Frons above somewhat narrower than the eye, somewhat 

 protriiding. Head silvery white or yellowish; orbits dark just at 

 vertex when seen from above; frontal stripe velvet black. Ocellar 

 bristles somewhat small, more or less individualised among the 

 hairs; strong inner, but no outer verticals. Orbits bare; jowls with 

 white hairs only below. Occiput bluish grey pruinose with white 

 hairs, but bare above; only one row of postocular bristles. Antennæ 

 black, second joint sometimes a little reddish towards apex; third 

 joint about twice as long as second; arista thickened in nearly basal 

 half. Thorax black, bluish grey pruinose, with four black stripes, 

 the median abbreviated before the suture, narrow, the lateral broad. 

 Thorax black-haired. Scutellum with three marginal bristles on each 

 side, the apical somewhat small, crossing. Abdomen black with 

 second segment, except extreme base and third segment red; from 

 the base a black triangle stretches backwards towards or to the 

 end of second segment, and from the black apical part a prolongation 

 may stretch more or less forwards, sometimes the prolongations 

 meeting to a black middle line; abdomen has a slight and narrow 

 silvery pruinose front band on third, a broader on fourth segment. 

 Abdomen is black-haired with marginal bristles, a pair on second and 

 third and a row on fourth and fifth segment; eighth segment with two 

 bristles; the pair on second segment is placed more or less forwards 

 as if the bristles were discai; third segment with some long bristles 

 at the apical corners on ventral side. Fifth sternite small, incised and 



