Dolichopodidae. ]51 



D. rupestris is very rare in Denmark, only five specimens have 

 been taken, all in 1882 in Jiitland at Hald near Viborg and at 

 Holstebro (H. J. Hansen); they were taken in August. 



Geographical distribution:— Northern and middle Europe down 

 into Germany and Bohemia: towards the north to northern Scandinavia, 

 and in Finland. 



6. Tacliytpeelius Stann. 



Species of medium or larger size, and of somewhat duU metallic, 

 generally æneous pr olive colour. Head a little broader than thorax; 

 it is short, higher than broad, highest in the males, and sometimes 

 as broad as high in the female; its greatest breadth lies above the 

 middle, and it is somewhat narrowed dow^nwards. Occiput slightly 

 arched. Vertex considerably excavated, the ocellar tubercle prominent. 

 Frons broad, decreasing in breadth towards the antennæ. There are 

 ocellar, outer vertical and postvertical bristles, and a pair of small 

 bristles on the posterior side of the ocellar tubercle. Eyes large, 

 oval, narrowed below; they are metallic green in the living speci- 

 mens, reddish at the upper angle and behind, and they are densely 

 short-hairy; the facets are in the male somewhat enlarged towards 

 the epistoma. The eyes are well separated, most in the female. The 

 postocular bristles strong, forming a single row ; the bristles on occi- 

 put along the oral aperture form a continuous row, being present 

 also above the aperture. The antennæ are inserted rather high, near 

 to each other; they are five-jointed, short or slightly elongated, and 

 generally a little longer in the male than in the female; the joints 

 are shaped about as in Dolichopus, and haired in the same way; 

 the third joint is somewhat short, rounded or truncately pointed at 

 the apex; the two last joints form a long, dorsal arista, with the 

 first joint somewhat long; the arista is bare, or apparently so. — In 

 a foreign species (the American species T. moechus) the second and 

 third antennal joints are very small, the arista long, with a dilatation 

 at the apex. — Epistoma in the male somewhat narrowed above, 

 but widening from the middle downwards; in the female it is broader, 

 as it is only slightly narrowed upwards, and also below it is a little 

 broader. Glypeus not small, it is a little arched and is marked off 

 from the epistoma at each side by a little elevation with a small 

 notch; its lower margin is rounded; it reaches to or almost to the 

 lower margin of the eyes. The proboscis is slightly protruding; it 

 and the oral aperture are of the same, or approximately the same size 

 in the two sexes. The proboscis (ammobates) is thick; labrum about 



