Aphiochaeta. 253 



visible at the hind margins. Venter brownish. Hypopygium small 

 and withdrawn, witli liairs below on the sides; ventral plate large, 

 rounded at the end, yellow; anal tube large and somewhat high, 

 strongly compressed, yellow. Legs yellow, hind femora darkened just 

 at apex, with long hairs below the basal half to beyond the middle; 

 bristles on hind tibiæ distinct, but not large, the upper small, below 

 them about six stronger, the dorsal hair-seam curved in the whole 

 length so that both ends are somewhat anterodorsal. Wings yellowish 

 brown, veins brown, thick veins more yellow; costa reaching to the 

 middle, 1 about equal to 2 + 3; angle at fork somewhat acute, outer 

 branch of the fork distinctly curved; costal cilia short or moderately 

 short; fourth vein issuing behind the base of the fork, evenly and not 

 much curved. Halteres yellow. 



Female. I do not know the female, but, according to Schmitz's 

 description, it is quite similar, only is the frons a little less broad, 

 the antennæ smaller though still above ordinary size, and 1 seems to 

 be relatively longer. 



Length 2 — 2,4 mm. 



A. rubida is very rare in Denmark, only one specimen, a male, 

 has been taken, Lohals on Langeland ^V? 1920 (the author); this 

 sex was hitherto not known. The species is evidently nearly related to 

 emarginata. 



Geographical distribution: — Hitherto known only from Den- 

 mark and Silesia; in all only one male and one female are known. 



18. A. quadriseta Schmitz. 



1918. Schmitz, Jaarb. natuurh. Genootsch-. Limburg 1917, 143 {lutea 

 var. quadriseta) and 1919. Entom. Ber. Nederl. Ent. Ver. V, 186. 



Male. Unknown. 



Female. Frons somewhat broader than high, grey, duU; inner 

 bristle of lower row in about the same height as the outer; supra- 

 antennal bristles a little unequal, the upper a little nearer together 

 than the inner bristles of the middle row, the lower slightly more 

 approximate. Antennæ small, brownish black, arista distinctly pube- 

 scent. Thorax dark brown above, paler towards the margin, slightly 

 shining, with black pubescence. Pleura brown, darker above. Meso- 

 pleura bare. Scutellum with four bristles, the anterior a little weaker 

 than the posterior. Abdomen black or blackish, dull, sparingly short- 

 haired. Legs yellow, hind femora brown just at apex, below the basal 



