Pyrophaena. 225 



joints are also very broad and the second about as long as the first; 

 hind metatarsus somewhat tiiickened. The femora have rather short 

 hairs behind, dark on front femora, chiefly yellowish on posterior 

 femora; the front femora have a rovv of short, black, bristly hairs 

 below in the basal two thirds and middle femora some similar hairs 

 at the base; tibiæ short-haired. Wings more or less to rather strongly 

 brownish tinged, most about the middle. Squamulæ yellowish with a 

 darker margin and a yellow fringe. Halteres yellow. 



Female. Frons broad, bluish black and black-haired, with only 

 indications of side dust spots. Antennæ a little larger than in the 

 male. Thorax æneous, brightly shining, without stripes. Abdomen 

 about as in the male, but the markings more red, the sides or apical 

 corners of second and third segments dark and the flfth segment red 

 at base and sides ; sometimes the dark markings on second and third 

 segments more extended. Legs yellow, coxæ and trochanters black, 

 hind tibiæ with a black ring near apex ; tarsi black with middle meta- 

 tarsus yellow; front tarsi somewhat broad and flat, and also middle 

 tarsi except metatarsus a little broadened. 



Length 8,5 — 9,5 mm. 



The larva and pupa are described above. 



P. granditarsa cannot be termed common in Denmark, and is 

 generally only taken in one or a fevv specimens at a time; Lersø, 

 Amager, Utterslev Mose, Ordrup Mose, Dyrehaven, Lyngby Mose, 

 Ruderhegn, Boserup at Roskilde, Egebæks Vang; on Lolland at Strandby 

 west of Nysted; on Langeland at Lohals, and in Jutland at Horsens, 

 Sminge near Silkeborg, Randers and Frederikshavn. My dates are 

 n/e — 29/g^ \i occurs in fens and on open piaces in woods on flowers, 

 often near water. The larva was found in flood refuse in Utterslev 

 Mose, Ruderhegn and at Randers in April, it developed in May and 

 June (Schlick); further it was found in the same way in Ruderhegn 

 on ^/2, it pupated on ^'^k and developed on ^^/o (Kryger); the pupa 

 was found in Utterslev Mose in July (Schlick). 



Geographical distribution : — Northern and middle Europe down 

 into France; towards the north to northern Sweden, and in Finland; 

 it occurs also in North America. 



2. P. rosarum Fabr. 



1787. Fabr. Mantis. Ins. II, 341 et 1794. Ent. Syst. IV, 307, 109 

 {Syrphus) et 1805. Syst. Antl. 251, 11 {Scaeva). — 1822. Meig. Syst. Beschr. 

 III, 338, 94 {Syrphus). — 1843. Zett. Dipt. Scand. II, 755. 58 et 1849. 

 VIII, 3152, 58 {Scaeva). — 1862. Schin. F. A. I, 298. — 1901. Verr. Brit. 

 Fl. VIII, 392, 2, fig. 260. — 1907. Kat. palåarkt. Dipt. III, 47. 



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