Aphiochaeta. 383 



the tip, with the hairs below the basal half somewhat long; bristles 

 on hind tibiæ distinct, but fine and hair-like. Wings brown and veins 

 brown or dark brown and rather strong, the seventh vein a little 

 weaker; costa reaching beyond the middle, 1 about equal to 2+3; 

 costal cilia long; angle at fork not acute; fourth vein somewhat 

 curved in its first part, for the rest a little evenly curved. Halteres 

 yellow. 



Female. Unknown (see under breviterga). 



Length 1,6 to nearly 2 mm. 



I think it possible that the present species is the male of brevi- 

 terga (see below under this species). 



A. similata seems to be rare in Denmark; Ermelund ^^U 1919 

 and ^76 1920 (the author), Geel Skov 'Ve 1919 (not 1918 as erroneously 

 given in my first description) (Th. Mortensen) and in Jutland in Egense 

 Skov at the east end of Limfjorden ^V? 1921 (the author). 



Geographical distribution: — Hitherto only known from Den- 

 mark. 



125. A. pulicaria Fall. 



1823. Fall. Dipt. Suec. Phytom. 7, 6 (Trmeura). — 1838. Zett. Ins. Lapp. 

 795, 4 {Trmeura). — 1848. Zett! Dipt. Scand. VII, 2859, 7 {Trineura). — 1864. 

 Schin. F. A. II, 341 (Phora). — 1901. Beck. Abhandl. zool. bot. Gesell. Wien, 

 I, 62, 55 (Phora)^ — 1909. Wood, Ent. Month. Mag. 2, XX, 195, 243 {Phora). 

 — 1910. Kertész, Gat. Dipt. VII, 411. — 1914. Brues, Bull. Wisc. Nat. Hist. 

 Soc. XII, 127. 



Male. Frons broader than high, black, very slightly greyish, 

 duU or dullish; inner bristle of lower row in or about in the same 

 heiglit as the outer and nearer to it than to the upper supraantennal; 

 supraantennal bristles varying from equal or almost equal to the lower 

 being less than half the size of the upper; the upper supraantennals 

 nearer together than the inner bristles of middle row, the lower 

 almost not more approximate. Antennæ of ordinary size, black to 

 brownish or reddish brown, arista distinctly pubescent. Palpi yellow 

 or dusky yellow, of ordinary size, with well developed bristles. Thorax 

 black, slightly shining, almost dull, with brownish pubescence; some- 

 times, but rarely, thorax is paler, brownish to reddish brown. Meso- 

 pleura bare. Abdomen is not slender and it is a little depressed; it is 

 black, slightly greyish, dull; the very short hairs almost not longer 

 at the hind margins of the segments, only at the hind margin of sixth 

 segment a little longer. Hypopygium small, greyish or brownish grey. 



