126 Tachinidae. 



Remarks: I have seen two specimens of O. cylindrica from 

 Zetterstedt's collection, one was the present species, the other auri- 

 ceps. 



2. O. auriceps Meig. 



1838. Meig. Syst. Beschr. VII, 213, 3. — 1900. Stein, Ent. Nachricht. 

 XXVI, 132. — 1903. Villen. Wien. Ent. Zeitg. XXII, 40, 5. — 1907. Kat. 

 palåarkt. Dipt. III, 429. — 1924. Stein, Arch. f. Naturgesch. 90, 6, 174, 1. — 

 O. æarctata Loew, 1844. Stett. Ent. Zeitg. V, 239, 8. ~ 1862. Schin. F. A. I, 

 417. — O. interrupta 1862. Schin. F. A. I, 414, p. p. — O. Mussinii Rond. 

 1861. Arch. Zool. Modena I, 273, 1 et 1861. Dipt. Ital. Prodr. IV, 125, 1. — 

 1894. Pand. Rev. Entom. XIII, 63, 7. — 1907. Villen. Ann. Soc. Ent. de Fr. 

 LXXVI, 380. — O. Picciolii Rond. 1861. 1. c. I, 275, 6 et 1861. 1. c. IV, 128, 6. 



Male. Very similar to the preceding. Head of same shape and 

 colour and with the same bristles. Jowls partly with black hairs. 

 Antennæ smaller with second joint a little reddish; third joint only 

 a little longer than second. Thorax as in brassicaria. Scutellum with 

 only two marginal bristles on each side, the basal wanting. Abdomen 

 black, second segment except base and third segment except hind 

 margin red, but with a continuous black middle stripe. Abdomen 

 has discai and marginal bristles, second and third segment with a 

 pair, or sometimes more, of discai and marginal, fourth and fifth 

 with a pair of discai and a row of marginal bristles; the discai bristles 

 may be irregnlar, and they may sometimes be wanting on some or 

 all segments (Picciolii Rond.); eighth segment without bristles. 

 Tibiæ somewhat fringed with fme hairs, especially posterior tibiæ 

 on ventral side. Subcostal vein ending above medial cross-vein. 



Female. Quite similar and with the same differences as in 

 brassicaria. The apical corners of second abdominai segment on 

 ventral side with a patch of short, strong spinules, and also, but 

 less strong, on third segment; of the two apical segments the first 

 somewhat pear-shaped, the apical claw-shaped, two-pointed at apex. 



Length 7 — 10 mm. 



O. auriceps is somewhat common in Denmark; Nyrup Hegn, 

 Humlebæk, Lave Skov at Helsingør, Rørvig, Tisvilde; on Funen at 

 Odense and Middelfart and in Jutland at Sønderborg; the dates are 



Geographical distribution: — Europe; towards the north to 

 middle Sweden (see remarks). 



Remarks: As noted under brassicaria a specimen of cylindrica 

 from Zetterstedt's collection proved to be auriceps. 



