340 Tachinidae. 



angew. Ent. VII, 153. — 1924. Stein, Arch. f. Naturgesch. 90, 6, 79, 19 (Exorista). 



— Parexorista acrochaeta B. B. 1891. 1. c. LVIII, 319 et 325. - 1907. Villen. 

 1. c. XXVI, 252, 31. — Par. irregularis B. B. 1891. 1. c. LVIII, 323. — 1907. 

 Villen. 1. c. XXVI, 251, 23. — Megalochaeta hrachystonia B. B. 1891. 1. c. 

 LVIII, 317. — 1907. Villen. 1. c. XXVI, 253, 36. — Z. oculosa Pand. 1895. 

 Rev. Entoni. XIV, 334, 2. — 1907. Villen. Ann. Soc. Ent. de Fr. LXXVI, 

 383. ^ Z. trizonata Pand. (nec Zett.) p. p. 1895. 1. c. XIV, 337, 6. — 1907. 

 Villen. 1. c. LXXVI, 384. — Ex. stulta Pand. (nec Zett.) 1896. 1. c. XV, 24, 35. 



— 1907. Villen. 1. c. LXXVI, 386. 



Of this species I know only the female. Frons above fully as broad 

 as the eye, somewhat protruding; jowls about one fifth of the lieight 

 of the eye. Orbits grey, downwards together with cheeks whitish; 

 jowls whitish grey; frontal stripe velvet black, widening downwards. 

 Frontal bristles descending to insertion of arista, the two uppermost 

 reclinate (but the anterior of them rather converging). Vibrissæ 

 ascending to middle, the upper four or five rather small. Orbits and 

 jowls both with rather sparse, black hairs. Occiput grey, with sparse 

 pale hairs, and rows of black hairs behind postocular bristles. Eyes 

 pale-hairy. Antennæ black, third joint not thrice as long as second; 

 arista as long as antennæ, thickened in about basal half. Palpi blackish. 

 Thorax blackish, grey pruinose, with four narrow black stripes, the 

 median abbreviated behind, the lateral divided at the suture into 

 two elongated spots; scutellum yellowish, grey pruinose. Thorax 

 black-haired. Three sternopleural bristles. Abdomen elongated ovate, 

 black, the three last segments almost quite grey pruinose, only 

 slightly shifting with dark according to view; second segment, narrow 

 hind margins and an indistinct middle stripe black or olive black. 

 Abdomen black-haired, with discai and marginal bristles, on second 

 segment a pair of marginal, some irregular discai on third and fourth 

 segment, and on third a pair, on fourth a row of marginal bristles. 

 Legs black. Wings somewhat tinged, brownish at base; veins brown; 

 first posterior cell ending near apex of wing; discai angle rectangular; 

 apical cross-vein strongly concave. Squamulæ whitish, the alar a 

 little yellowish. Halteres brownish. 



Length 7,5 mm. 



Z. porcula is rare in Denmark, I know only one specimen, taken 

 at Tisvilde in July. 



Geographical distribution: — Europe down into France; if the 

 species is porcula Zett. it goes towards the north to southern Sweden. 



Remarks : I have kept the name porcula, but whether the species 

 is porcula Zett. cannot be decided, for according to a communication 



