462 Syrphidae. 



of second, third and fourth segments orange, but generally obscure 

 and narrow, Abdomen is clothed with not quite short hairs, which 

 are all pale or more or less black at the hind margins of the seg- 

 ments. Genitalia large but smaller than in the preceding species, 

 greyish yellow pruinose, yellow-haired. Venter blackish grey, duU, 

 clothed with not long, pale hairs. Legs black and yellowish; anterior 

 femora with about the apical third yellowish, but the black basal 

 colour often only present above and below; hind femora similarly 

 coloured but more reddish, and also narrowly pale at the base, and 

 the reddish colour stretching along the whole length above and also 

 often below so that the black colour form two patches, a larger behind 

 and a smaller in front; the extreme apex is black above; anterior 

 tibiæ yellow, the front tibiæ a little darkened at the apex, front tarsi 

 more or less darkened, middle tarsi darkened towards the end; hind 

 tibiæ black on the apical third and more obscurely on the basal third 

 but the extreme base yellow, they are thus yellow with two dark 

 rings; hind tarsi black. The legs haired as usual, the hairs all pale, 

 middle femora with a few short, black hairs anteriorly on the apical 

 part; hind femora black setulose below. Wings varying from nearly 

 hyaline to somewhat brownish. Stigma consisting only of the cross- 

 vein. Squamulæ and fringes whitish. Halteres pale yellow. 



Female. Vertex and frons a little broader than in the male, 

 evenly widening downwards; vertex blackish, frons paler pruinose; 

 the hairs black. Abdomen broader, first segment grey; the spots 

 with the part stretching in on the disc longer and more lunulate; 

 fifth segment quite yellowish grey with only a very narrow, abbreviated 

 middle stripe; the segments are only slightly shining at the hind 

 margins or only at the sides; for the rest the hind margins are 

 covered by grey bands, broadest in the middle, narrower towards the 

 sides and thus somewhat triangular, almost or quite covering the 

 orange margin. The legs are often much paler than in the male, the 

 anterior femora only indefinitely blackish at base and the black patches 

 on hind femora smaller. 



Length 8,5 to fully 9 mm. 



//. lunulatus is a rare species in Denmark; Ordrup Mose, Erme- 

 lund (the author). Fuglevad, Søllerød (Klocker), Hellebæk (Stæger); 

 on Lolland in Dødemose west of Nysted (L. Jørgensen) ; in Jutland in 

 Nørholm Skov at Varde (Esben Petersen), and on Bornholm in Al- 

 mindingen (H. J. Hansen). My dates are ^^k—^^h. 



Geographical distribution : — Northern and middle Europe down 

 into Austria, Hungary and Styria; towards the north to southern 

 Sweden, and in Finland. It is rare evervwhere. 



