260 Tachinidae. 



cornis Zett. 1844. Dipt. Scand. III, 1172, 175 et 1849. VIII, 3250, 175 et 1859. 

 XIII, 6134, 175. — 1896. Pand. Rev. Entom. XV, 171, 1 (SarcopJiila). — 1900. 

 Villen. Bull. Soc. Ent. de Fr. 403, 17 et 1907. Ann. Soc. Ent. de Fr. LXXVI, 

 394. — Tachina nigritarsis Zett. 1844. 1. c. III, 1169, 172 et 1849. VIII, 3249, 

 172. — Dexia tachiniformis Zett. 1844. 1. c. III, 1280, 17. 



Male. Frons as broad as the eye, a little protruding. Head dark 

 grey; frontal stripe blackish, or reddisli anteriorly. Two orbital 

 bristles, but the upper often small. Orbits and cheeks hairy, the 

 latter with some bristles below; jowls with black hairs below. Occiput 

 grey, with black hairs. Antennæ black, third joint a little longer 

 than second; arista thickened at base. Palpi yellowish. Thorax 

 greyish or brownish black, grey pruinose, with three blackish stripes, 

 the median reaching to scutellum, the lateral abbreviated behind; 

 sciitellum yellow at apex. Thorax black-haired. Abdomen blackish, 

 a little translucently reddish at the sides, the three last segments 

 with a greyish or whitish pruinose front band, especially broad at 

 the sides, somewhat shifting in colour according to view; the bands 

 interrupted in the middle so that a black middle-line is formed. 

 Abdomen is black-haired, with marginal bristles, on second segment 

 none, on third a pair and on fourth and fifth a row. Genitalia rather 

 large, protruding downwards, more or less covered by the fifth 

 sternite which is large, arched downwards and cleft to the base, the 

 large, rounded side lamellæ of yellowish colour. Legs somewhat 

 robust, femora black with apical part reddish, especially below; 

 tibiæ reddish, the base generally blackish, and tarsi black. Wings 

 only slightly tinged; veins blackish brown; posterior cross-vein in 

 the middle between medial cross-vein and angle; anal vein some- 

 what short. Squamulæ a little yellowish. H alteres yellow. 



Female. Similar; frons slightly broader; antennæ with basal 

 joints pale. Legs paler, posterior femora generally quite yellowish, 

 and likewise tibiæ. 



Length. About 5 — 5,5 mm. 



F. rubricosa is not rare in Denmark; Humlebæk, Sletten, Tisvilde, 

 Rørvig, Boserup; on Lolland at Nysted; in Jutland at Skørping, 

 and on Læsø; the dates are 2/7 — ^7?- I* occurs especially m sandy 

 localities. I have taken it in copula on i*/,. 



Geographical distribution: — Europe and down into Algeria; 

 towards the north to middle Sweden, and in Finland. — The species 

 has, as seen, been described under several names, to the above syno- 

 nymy Stein still adds geniharbis Meig. 



