460 Tachinidae. 



110, 4 {Thryptocera). — 1907. Kat. palåarkt. Dipt. III, 390. — 1921. Baer, 

 Zeitschr. f. angew. Ent. VII, 371. — 1924. Stein, Arcli. f. Naturgesch. 90, 6, 

 136, 12. — A. crassicornis var. rediocta Villen. 1920. Ann. de la Soc. Ent. de 

 Belg. LX, 66. 



Male. Very like the ioregoing species. Head of same shape and 

 colour. Antennæ black or the basal joints more or less pale; third 

 joint shorter than in nudibasis, at most four times as long as second, 

 broad and broadest near base; arista blackish, slightly pale at base. 

 Palpi yellow. Thorax as in nudibasis, the stripes rather indistinct; 

 scutellum quite dark or only pale just at apex. Abdomen qiiite as 

 in nudibasis, with similar bristles. Legs black or blackish. Wings a 



Fig. 96. Wing of A. pilipennis. 



little yellowish, most at base; veins brown; anal vein not reaching 

 margin; subcostal vein with not small bristles in the whole length, 

 the bristles not dense; cubital and pogtical vein likewise bristly in 

 nearly whole length; underside of subcostal vein bare. Squamulæ 

 yellow. H alteres dark yellow. 



Female. Similar, but antennæ reddish at base and on basal 

 part of third joint, and this latter not dilated. 



Length 4,5 to fully 5 mm. 



A. pilipennis is rare in Denmark, I know only se ven specimens, 

 four males and three females; Tisvilde, Lolland at Maribo and in 

 Jutland in Nørholm Skov at Varde and at Hov (Kryger, Sønderup, 

 the author); the dates are ^^Z, — ^^/g. It is recorded bred especially 

 from Evetria resinella and buoliana and further from a number of 

 other Microlepidoptera, but it has no doubt generally been fused 

 with nudibasis, so that the records are not sure. Two of my spec- 

 imens are bred, one from Tortrix viridana on ^^g (Sønderup), the 

 other from an undetermined Tortricid larva on Salix repens on ^^/lo 

 (Gudmann). 



Geographical distribution: — All Europe; towards the north 



