336 Phoridae. 



only slightly nearer to it than to the upper supraantennal ; supraan- 

 tennal bristles unequal, the lower about half the size of the upper; 

 the upper supraantennals nearer together than the inner bristles of 

 middle row, the lower only very slightly more approximate. Antennæ 

 somewhat large, black, arista short-pubescent. Palpi black, of ordinary 

 size and armature. Thorax black, somewhat shining, with dark 

 brownish pubescence. Mesopleura bare. Abdomen robust, black, 

 somewhat greyish and dull; it has sparse, short hairs, almost not 

 longer at the hind margins of the segments, but more distinct at the 

 sides; at the hind margin of sixth segment they are a little longer 

 and on the ventral hind margin of sixth segment there are strong, 

 bristly hairs. Hypopygium of medium size, black; it is somewhat 

 curious, but on my specimens I cannot study it quite satisfactorily; 

 it is dull from a dense, nearly microscopical punctuation; along the 

 whole hinder or lower margin somewhat dense, longish hairs are 

 hanging downwards, they seem to be best developed on the left side; 

 there is a small black ventral plate; anal tube somewhat short, but 

 stout, black or with a paler apex. Legs dark brown or blackish brown, 

 the front legs only slightly paler; hind femora rather broad, below the 

 basal two thirds there are unusually long and strong bristles, specially 

 long below the middle; under the microscope the bristles are distinctly 

 spinulose which is otherwise not the case; bristles on hind tibiæ of 

 good size in the lower two thirds, above they are fme. Wings somewhat 

 brownish tinged, veins brown; costa somewhat short, about 0,46 of 

 the wing-length, costal divisions about as 13 — 7 — 5; costal cilia short, 

 but moderately, rather midway between short and long, they are 

 relatively few in number, strong and distinctly spinulose; angle at 

 fork not large; fourth vein evenly curved, only slightly more at the 

 base. Halteres black. 



Female. Unknown. 



Length. Nearly 2 mm. 



A. merochaeta is rare, only two specimens, both males have been 

 taken, Ermelund ^^/s 1919 (the author) and Geel Skov "A 1921 

 (Th. Mortensen); the latter specimen was taken on a fresh stub of 

 Acer. 



Geographical distribution: — Hitherto only known from Den- 

 mark. 



