244 Syrphidae. 



and apex of abdomen paler. Eyes touching in the male, separated 

 in the female, but vertex and frons not broad; the eyes are hairy: 

 the facets in the male very slightly enlarged above, Antennæ inserted 

 well above the middle; they are porrected, a little elongated, third 

 joint longer than the two basal together; arista apparently bare. 

 Epistoma yellow, hairy; the central knob only little protruding, not 

 more than the frontal prominence; the mouth edge retreating, the 

 lateral mouth edges and the jowls only slightly descending. The mouth 

 parts resemble those in Syrphus, but the proboscis is short and it 

 and the mouth parts rather stout. Glypeus has the basal part large 

 and the side legs not long. Labrum is relatively short, broad and 

 stout, it has the apex of the usual shape. Hypopharynx and maxillæ 

 are likewise strong; the palpi short, not longer than the lacinia and 

 neither clubbed nor recurved. Labium rather short and thick, with 

 the labella of about the same length as the basal part. Thorax about 

 quadrate, a little broader than long; scutellum yellow, it has a fringe 

 below the margin. There are no bristles present. Abdomen rather 

 short and broad, somewhat roundish, it is broadest about the middle 

 and here considerably broader than thorax; it is black with the apex 

 reddish; the first segment very short, the second not long; there is 

 the same number of not transformed segments as in Sijrphus viz. five, 

 the fifth is small; as in Leucozotia the fifth ventral segment is partly 

 hidden, so that it looks as if it was unsymmetrical. Genitalia small. 

 In the female there are five visible segments. Legs simple, tarsi some- 

 what broad and flat, especially the last joint rather broadened ; claws 

 and pulvilli large. Schiner's statement that the femora are elongated 

 I do not find confirmed. Wings of usual shape: medial cross-vein 

 well before the middle of the discai cell; cubital vein a little incurved 

 in the middle of the first posterior cell; vena spuria distinct. Squa- 

 mulæ black, fringed as in Syrphus, the hairs on alar squamulæ con- 

 siderably flattened, the fringe on the thoracai squamulæ rather long. 

 Plumula with dense, longish, plumose hairs. 



This genus was separated from Syrpkus by Schiner at the same 

 time as Leucozona, and I think it is well founded on the shape of 

 the body and its colour. 



As far as I know the developmental stages have not been observed. 



Schiner states for this as well as for the foregoing genus, that the 

 species occurs especially in the mountains; with us it occurs on flowers 

 in fens and meadows. 



Of the genus only one species is known, also occurring in Den- 

 mark. 



I 



