264 



Syrphidae. 



breadth downwards as in pyrastri; the lower hinder corners of epistoma 

 not black. Antennæ blacker than in 2^y^'(^^i^^- Abdomen with the 

 lunules yellow or orange; they are more strongly lunulate than in 

 pyrastri as their outer end goes longer forwards and is as near the 



Fig. 117. L. pyrastri c?. Fig. 118. L. seleniticus (S. 



Heads from in front. 



front margin as the inner end; the outer end is also narrower and 

 more pointed, and it goes nearer to the side margin or even touches 

 it. The hairs on abdomen as in pyrastri, but in connection with the 

 upper corners of the spots there may be some yellow hairs on the 

 side margin, and the hairs below the side margin are more yellow. 

 The venter shows a good character as it is yellow with elongate 

 middle spots on the segments, the spots may vary somewhat in size, 

 but are never similar to the transverse spots in pyrastri; sometimes 

 the venter may be rather darkened and the spots then less visible. 

 Legs as in pyrastri, but the anterior femora quite yellow-haired, and 

 hind tibiæ with a brown or blackish ring on the middle, 



Female. Vertex and frons narrower than in pyrastri, and hence 

 the black part on vertex almost quadrate, wliile it is transverse in 

 pyrastri; frons more generally darkened. Fifth abdominal segment 

 with more or less distinct spots at the basal corners. 



Length 12 — 15,5 mm, it is thus, according to my specimens, upon 

 the whole larger than pyrastri. 



The species is, as said, very similar to pyrastri, but it is certainly 

 distinct and well distinguished by the characters given. 



L. seleniticus seems to be rare in Denmark, and is also in other 

 countries generally recorded as rarer than pyrastri; Copenhagen, 

 Amager, Lersø, Ordrup Mose, Fiskebæk, Hillerød, Tisvilde ; on Lolland 

 at Fuglse; in Jutland at Horsens, Hald near Viborg, Rebbild near 

 Skørping and Hulsignear Frederikshavn, and on Bornholm at Hammeren. 



