Aphiochaeta. ' 287 



almost not longer. Hypopygium small, greyish black, produced a 

 little downwards and thus higher than long, with three to five (per- 

 haps always five) small bristles or bristly hairs on each side, placed 

 in a vertical or obliqiie line, and also with some hairs above on the hind 

 part; anal tube of some length, black or blackish, the apical hairs 

 not small. Legs brownish to blackish brown, the front legs paler to 

 yellowish; front metatarsi dilated, about as wide as the end of tibiæ, 

 the anterior margin straight, the posterior a little convex ; metatarsus 

 and last joint somewhat dusky; the hairs below the basal half of 

 hind femora slightly longish; the bristles on hind tibiæ small, but 

 distinct, more numerous than in subcarpalis^ about 14 in number, 

 the dorsal hair-seam curved distinctly towards the anterior from the 

 middle downwards; hind tibiæ as long as the three first tarsal joints. 

 Wings a little or somewhat yellowish or light brownish tinged, though 

 rather clear, veins brown; thin veins distinct, though not exactly 

 strong, seventh vein distinctly finer and paler; costa 0,45 — 0,46 of 

 the wing-length, costal divisions about as 13^6 — 3 or 4 — 2 — 1; 

 costal cilia long; fourth vein evenly curved. Halteres black. 



Female. Similar; costa a little longer; front metatarsi less, but 

 still perceptibly thickened. 



Length 1,6 — 1,8 mm. 



A. siibconvexa seems to be rare; Ermelund, Lyngby (the author), 

 Holte (Th. Mortensen), in all four males and two females; the dates 

 are Ve— V9 in 1917 and 1919. 



Geographical distribution: — Hitherto only known from Den- 

 mark. 



46. A. dactylata Lundbk. 

 1920. Lundbk. Vidensk. Meddel, fra Dansk naturh. Foren. 71, 9. 



Male. Frons somewhat broader than high, greyish black, duU; 

 inner bristle of lower row a little or somewhat below the outer and 

 nearly in the middle between it an the upper supraantennal; supra- 

 antennal bristles equal or nearly so, the upper about as distant as the 

 inner bristles of middle row, the lower a little more approximate. 

 Antennæ somewhat small, blackish brown, arista distinctly pubescent. 

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

 shining, with brownish pubescence. Pleura a little brow^nish, especially 

 anteriorly. Mesopleura bristly, the bristles uniform. Abdomen black, 

 dull, venter yellowish or brownish ; abdomen has short hairs, best visible 



