244 Tachinidae. 



discai and marginal bristles; second segment with a pair of marginal, 

 third with a pair of discai and of marginal, and fourth with a pair of 

 discai and a row of marginal bristles; sometimes there are some 

 supplementary discai bristles; fifth segment quite covered with 

 bristles. Legs black. Wings brownish tinged, most towards the anterior 

 margin, more yellow at base; veins brown; first posterior cell very 

 narrowly open, ending a little before apex of wing; discai angle 

 obtuse. Squamulæ brownish yellow. 



Female. Similar; frons about as broad as the eye; orbits grey. 

 Eyes less haired, with pale hairs. Thorax a little more pruinose. 

 Three last joints on front tarsi quite slightly flattened. 



Length 7 — 9 mm. 



M. tenehricosa is someM^hat common in Denmark; Ordrup Mose, 

 Dyrehaven, Ruderhegn, Donse, Grib Skov, Allindelille, and in Jut- 

 land at Hejls and Kolding (J. C. Nielsen, the author), and at Frijsen- 

 borg and Hald (H. J. Hansen); the dates are ^^e — ^Vs- No sure host 

 seems hitherto known (but the species has been generally confused 

 with chalconata); two of my specimens are bred from the larva of 

 Ch. fastuosa in May (Kryger). 



Geographical distribution : — The species seems distributed over 

 all Europe, towards the north to northern Scandinavia, and in Fin- 

 land. 



Remarks: As the specimens in Stæger's collection have been 

 determined by Zetterstedt they are thus co-types, and the above 

 synonymy sure. The determination of the species as tenebricosa 

 + tristis is due to Dr. Villeneuve. I think that rufipalpis Macq. 

 belongs liere as the author had got his specimen from Stæger, and 

 tenebricosa is, I think, the sole species with which his description 

 agrees. Which of the other synonyms may belong to the present 

 species or to chalconota is at present impossible to say. 



40. Macpopposopa B. B. 



Species of medium size and shining black colour. The genus is 

 very nearly related to the foregoing and in most characters conform 

 with it. Head fully as broad as thorax, slightly convex behind and 

 somewhat puffed out below; otherwise as in Macquartia and with 

 the same bristles, but frons only slightly protruding. Frontal bristles 

 less descending, only to insertion of antennæ. Gheeks hairy on upper 



