420 Tachinidae. 



XXVI,248, 13 et 261, 13 {Clista). — 1907. Kat. palåarkt. Dipt. III, 436 (Fortisia). 

 — 1919. Villen. Bull. Soc. Ent. de Fr. 356 (Fortisia). — 1924. Stein, Arch. f. 

 Naturgesch. 90, 6, 160, 2. — L. intermedia B. B. 1898. Stzungsber. Akad. 

 AViss. Wien, CVII, 256. — 1907. Kat. palåarkt. Dipt. III, 404. 



Male. Frons very narrow above. Orbits blackish; cheeks grey, 

 and jowls dark grey; frontal stripe velvet black. Eyes with short, 

 brownish hairs. Orbits with black hairs, and cheeks with some, gener- 

 ally few hairs, especially below; jowls with strong bristly hairs. 

 Occiput greyish black, behind postocular bristles with all black and 

 some few pale hairs. Antennæ black, short; arista short, abruptly 

 thickened only at base. Palpi black or blackish brown. Thorax bluish 

 black, shining, without pruinosity, black-haired. Abdomen bluish 

 black, shining, with strong, black hairs; tliere are discai and marginal 

 bristles; second segment without bristles, third and fourth with 

 some pairs of discai and a pair of marginal bristles; fifth nearly 

 quite covered with bristles. Legs black, short and robust, posterior 

 side of hind tibiæ arched; the legs have well developed bristles. 

 Wings somewhat brownish tinged, especially at base; veins brown; 

 first posterior cell short-petiolate ; discai angle obtuse, but somewhat 

 sharp; postical vein rather curved and diverging from discai vein. 

 Squamulæ yellow. Halteres brownish yellow. 



Female. Similar; frons fully as broad as the eye; head lower 

 than in male and thus eyes lower and jowls relatively broader. Orbits 

 black, shining. Eyes very sparingly haired. Antennæ with second 

 joint red. Wings strongly brown, only less towards hind margin, the 

 browning either evenly present on the wing, or especially seaming 

 the veins broadly; rarely the wings less brown. 



Length 6 — 7,5 mm. 



L. foeda is rare in Denmark; at Copenhagen, Gentofte, Frerslev 

 Hegn, Tisvilde; on Langeland at Lohals, and in Jutland in Nørholm 

 Skov at Varde (L C. Nielsen, Kryger, the author) and in Greisdal 

 (H, J. Hansen); the dates are ^Z, — ^^/g. One of the specimens is bred 

 from a Lithobius. 



Geographical distribution : — Europe down into France ; it is 

 not known north of Denmark. 



2. L. petiolata Pand. (nec R. D.). 



1895. Pand. Eev. Entom. XIV, 318, 2 {Silbermamria). — 1907. Villen. 

 Ann. Soc. Ent. de Fr. LXXVI, 383 {Silbermannia). — 1907. Kat. palåarkt. 

 Dipt. III, 404 p. p. — 1919. Villen. Bull. Soc. Ent. de Fr. 356 (Fortisia). — 

 1924. Stein, Arch. f. Naturgesch. 90, 6, 160, 3. 



