Aphiochaeta. 335 



than to the upper supraantennal ; supraantennal bristles unequal, 

 the lower somewhat smaller than the upper; the upper supraantennals 

 about in the same distance from each other as the inner bristles of 

 middle row, the lower more approximate and near up to the upper. 

 Antennæ of ordinary size, brownish black, arista short-pubescent. 

 Palpi yellow, of ordinary size and armature. Thorax black, almost 

 not shining, with brownish pubescence. Mesopleura with uniform 

 bristles. Abdomen a little robust, black, greyish above and dull; 

 it is distinctly hairy, the hairs a little longer at the hind margins of 

 the segments and at the sides; at the hind margin of sixth segment 

 the hairs longish. Hypopygium small, greyish, with a nearly vertical 

 row of small bristly hairs on each side; ventral plate dusky yellowish, 

 small, nearly square; anal tube short, but high, yellow. Legs yellow 

 or brownish yellow; they are rather short and robust, the femora 

 somewhat thick, front tibiæ not much more than half as long as femora, 

 also middle tibiæ short and a little arched, hind tibiæ likewise short 

 and distinctly arched; all tibiæ somewhat thick; the hairs below the 

 basal part of hind femora not long; bristles on hind tibiæ distinct and 

 not short, but fme, the dorsal hair-seam deflected anteriorly in the 

 distal half. Wings brownish, veins brown and somewhat strong, 

 especially costa and third vein a little thick; costa about 0,41 of the 

 wing-length, costal divisions about as 10 — 5 — 3; costal cilia long; 

 angle at fork somewhat acute; fourth vein slightly and evenly curved. 

 Halteres yellow. 



Female. Unknown. 



Length 1,7 mm. 



A. brevipes is very rare, only one specimen, a male, has been 

 taken, Jutland at Ry ^Vt 1918 (the author). 



Geographical distribution: — Hitherto only known from Den- 

 mark. 



Group VI. 



Scutellum with two bristles. 



Mesopleura bare. 



Costa long. 



86. A. merochaeta Lundbk. 



1921. Lundbk. Vidensk. Meddel, fra Dansk naturli. Foren. 72, 137, 9. 



Male. Frons somewhat broader than high, black, slightly grey- 

 ish, dull or nearly; inner bristle of lower row below the outer and 



