536 Syrphidae. 



tarsi reddish or yellowish, but second and third tarsal joints with the 

 extreme base black; also hind tarsi with the basal joints, especially 

 second and third somewhat pale; the hind femora are thickened and 

 have below on the apical half two rows of short but strong spines; 

 hind tibiæ slightly curved, somewhat dilated in the apical half, hind 

 metatarsi a little thickened; the legs short-haired, only behind middle 

 femora a little longer hairs; the hairs pale; the four first joints of 

 the anterior tarsi have a small apical bristle on each side. Wings 

 somewhat brownish tinged; stigma only shghtly darker; cubital vein 



Fig. 17S. Wing of E. sahulonum c?. 



curved a little down over the first posterior cell; medial cross-vein 

 placed on the middle of the discai cell. Squamulæ and fringes whitish. 

 Balteres yellow. 



Female. Similar to the male; vertex and frons broad, nearly 

 parallel-sided, black; the hairs whitish, dark about the ocelli. The 

 antennæ considerably larger than in the male. 



Length. This species varies somewhat in size, the length from 5 

 to fuUy 8 mm. 



E. sahulonum is common in Denmark on suitable localities; Char- 

 lottenlund, Ørholm, Brede, Vedbæk, Tisvilde, Frederiksværk, Rørvig, 

 Nykøbing; on Lolland; on Funen at Faaborg; in Jutland in Nørholm 

 Skov at Varde, at Horsens, Søndervig, Frijsenborg, Silkeborg and Laven 

 near Silkeborg and at Skagen ; on Bornholm at Rønne. My dates are 

 ^/e— ^-^/s. It occurs exclusively on sandy localities and therefore often 

 near the shore. 



Geographical distribution: — Europe down into Spain and Italy; 

 towards the north to middle Sweden. 



Remarks: I have in the description specially mentioned- the small 

 bristles at the ends of the four first joints of the anterior tarsi because 

 of what Verrall says about this character; the said author is some- 

 what inclined to think that the true sahulonum should have no bristles 

 and that the form with the bristles might be a distinct species {litoralis 

 Curt.); this is because Loew ascribed sahulonum no bristles as character 



