94 Syrphidae. 



in Kat. palåarkt. Dipt. (after Verrall). To which of the two species 

 Verrairs lugubris may belong I cannot say. 



F. austriaca seems to be rare in Denmark, we have tour speci- 

 mens, two males and two females; they are taken in Ordrup (Stæger) 

 and in Jutland at Horsens (O. G. Jensen); the only date is ^/s. 



Geographical distribution:— The species (or one under this name) 

 is recorded down into Itaiy; as Zetterstedt did not seem to know it, 

 it does not seem to oceur north of Denmark. 



7. Clipysogastep Meig. 



Species of medium size and of black or more or less metalh'c 

 colour. Head somewhat semiglobular, as broad as or a Httle broader 

 than thorax, and somewhat hollowed behind. Eyes in the male 

 touching for a shorter or longer distance, or in some species (Sub- 

 genus Liogaster) separated; in the female broadly separated. Frons 

 in the male more or less arched, sometimes (Subgenus Chrysogaster) 

 considerably arched and puffed out; in the female the frons is charac- 

 teristic, it has in the middle a more or less jmarked, longitudinal, 

 depressed line or space, or this space is bounded at each side by an 

 impressed line; on each side of the middle space there is a various- 

 number of more or less pronounced cross-furrows. Eyes bare; the 

 facets are of equal size {Liogaster) or the upper facets are somewhat 

 enlarged in the male; sometimes {Chrysogaster) they are enlarged 

 in the upper half and the division between the large and small facets 

 is then rather distinct. Antennæ inserted about in the middle or a 

 little above or below this; they are short or somewhat elongated, as 

 the third joint is either short, roundish or more quadrate, sometimes 

 rather large, or it is more or less elongated, sometimes linear; the 

 two basal joints short, especially the first. Arista inserted dorsally 

 at the base of the third joint, with very small basal joints, only seen 

 under the microscope. The basal antennal joints have bristly hairs, often 

 long below second joint; the third joint and the arista microscopically 

 haired. Epistoma is somewhat various: in the male it is either straight, 

 without central knob, only a little arched, or it is hollowed beneath 

 the antennæ with a smaller or larger, more or less projecting central 

 knob, in Liogaster hollowed without knob as in the female; the mouth- 

 edge is more or less projecting, sometimes slightly or almost not; in 

 the female there is no central knob, but the epistoma is more hol- 

 lowed, and with the mouth-edge more projecting; the epistoma is 

 black or metallic, very slightly haired, or nearly bare. The jowls 



