284 Tachinidae. 



greyish or yellowish silvery, dark in some views; jowls grey; frontal 

 stripe velvet black or brownish black. Orbits and jowls black-haired. 

 Occiput grey with whitish yellow hairs, sparse above, and with 

 black hairs behind postocular bristles. Antennæ black, third joint 

 long, more than thrice as long as second, reaching below the eyes, 

 to about the large vibrissa; arista thickened in fully basal third. 

 Palpi black. Thorax quite grey pruinose, with four narrow greyish 

 black stripes, the median abbreviated behind, the lateral divided 

 at the suture into two elongate spots; scutellum grey. Thorax with 

 short black hairs ; apical scutellar bristles a little converging. Abdomen 

 quite grey or yellowish grey pruinose, without markings; it is black- 

 haired, with discai and marginal bristles as in mutabilis. Legs black. 

 Wings a little tinged, yellowish at base; veins brown; first posterior 

 celi narrowly open or just closed, ending a little before apex of wing; 

 a distinct costal spine present. Squamulæ with a yellow margin. 

 H alteres yellow with the knob a little brownish. 



Female. I have not seen the female; according to the descrip- 

 tions it is quite similar to the male. 



Length 7 to about 8 mm. 



M. incana is rare in Denmark, I only know three specimens, all 

 males, from Grib Skov (Kryger) and Rørvig (J.C.Nielsen); the 

 dates are in July and to ^^/g. 



Geographical distribution: — Northern and middle Europe 

 down into France; towards the nortli to southern Sweden, and in 

 Finland and Lapland. 



58. Viviania Rond. 



Species of medium size, all greyish or yellowish grey pruinose. 

 The genus is nearly related to Meigenia and in most respects con- 

 form with it. Head as broad as thorax, rather flat behind. Frons 

 somewhat narrow in male, broader in female, moderately protruding. 

 Jowls nearly half as broad as the eye is high. Frontal bristles at most 

 descending to the end of second antennal joint. Cheeks bare, just 

 above with some fine hairs. Epistoma as in Meigenia produced down- 

 wards, below the large vibrissa. Antennæ inserted well above the 

 middle of the eye, third joint fully twice as long as second. Thorax 

 rectangular, with three postsutural dorsocentrals and three præ- 

 and three, sometimes four postsutural acrostichals, but with no 

 præsutural intraalar bristle. Scutellum with three or four marginal 



