566 Syrphidae. 



two last joints of all tarsi black or blackish ; hind femora less thickened 

 than in horealis ; the legs haired in the same way but the hairs gener- 

 ally more black on anterior femora. Wings yellow along the anterior 



Fig. 191. Wing of S. lappona S- 



part with a faint blackish clouding before the apex. Squamulæ and 

 fringes brownish. Halteres with yellow peduncle and a brownish 

 black knob. 



Female. Similar; vertex and frons broad, widening downwards, 

 black with greyish dust spots, meeting in the middle; the hairs dark 

 above, yellow below. Abdomen with the fifth segment black, yellow- 

 haired, and the segments with yellow hairs at the hind margins. 



Length 10,5 to nearly 13 mm. 



S.lappona is much more rare in Denmark than horealis; Dyre- 

 haven, Lyngby Mose, and in Jutland at Frijsenborg and at Funder 

 near Silkeborg. My dates are ^^/s to the beginning of July. It occurs 

 on the same localities as horealis^ perhaps more preferring moors, and 

 it occurs sometimes in company with horealis. 



Geographical distribution : — Europe down into Italy ; towards 

 the north to northern Sweden, in Finland and on the Faroe Islands 

 and Iceland ; it occurs also (if correct) in Canada (but not, as Verrall 

 says in Greenland, as Volucella lappona by Otto Fabricius is some 

 species of Syrphus). 



V. Chrysotoxinae. 



48. Clipysotoxuin Meig. 

 Species of large or moderate size, of dark colours with yellow 

 markings on the sides of the thoracai disc and on pleura, and with 

 characteristic, yellow, interrupted bow-shaped bands on abdomen; the 

 species are not very hairy. Head not short, somewhat semiglobular, 

 a little broader than high and broader than thorax; it is somewhat 

 excavated behind. Eyes touching in the male, well separated in the 



