240 Syrphidae. 



fifth segment. Venter greyish black, with or without pale spots like 

 the dorsal, and with long, pale hairs, intermingled with some black. 

 Legs somewhat long and slender, black or blackish; femora haired in 

 the usual way with rather long hairs, chiefly blackish on anterior 

 femora or yellow at the base, pale on hind femora; tibiæ short-haired 

 with dark hairs, only hind tibiæ with some hairs a little longer about 

 the middle on the antero-dorsal side; hind tibiæ a little thickened in 

 the middle, and below the thickening somewhat incurvated on the 

 posterior side. Hind tarsi rather long, metatarsus slightly thickened; 

 the last joints on front tarsi a little broad. Wings more or less 

 brownish tinged, sometimes almost not ; stigma strongly brown. Squa- 

 mulæ and fringes yellowish. Balteres with the peduncle dark, the 

 knob yellow. 



Female. Frons broad, black-haired. Thorax [shining, haired as 

 in the male, but the black hairs fewer or wanting, and pleura all 

 pale-haired. Abdomen black, shining, without spots, only in some lights 

 a pale pruinosity is visible at the basal corners of third and fourth 

 segments; (Verrall has in one case found spots as in the male faintly 

 visible); the hairs on abdomen almost all pale, only on the hind 

 margin of third segment, on the hind part of fourth and on fifth and 

 sixth segments black hairs. Legs haired as in the male, but the hairs 

 all yellowish. 



Length about 8 — 9 mm. 



M. quadrimaculata seems to be rare in Denmark, and it was for 

 the first time taken in 1909 ; it has only been taken in Geel Skov 

 (Th. Mortensen) and at Tisvilde (Kryger). It is a rather early occur- 

 ring species, my dates are '^/é — ^^/r.. It was seen in some number on 

 •V4 on the flowers of Gorylus, it was on a sunny day but the temper- 

 ature was low, not above 6° G. and it had been cold on the previous 

 days; it has also been taken on the flowers of SaUx. 



Geographical distribution : — The species is at present only known 

 from Denmark, England and Bohemia. 



14. Leucozona Schin. 



This genus agrees in most respects with Si/rphus and the allied 

 genera. The species is somewhat large and densely hairy ; the colour 

 is dark æneous and blackish with a pale basal abdominal band. Eyes 

 touching in the male, separated in the female, densely hairy; the 

 facets in the male slightly enlarged above. Anlennæ inserted well 

 above the middle, a little porrected, third joint longer than broad; 

 arista slightly, almost microscopically pubescent. Epistoma a little 



