Platychirus. 203 



F. peltattis is common in Denmark; Lersø, Utterslev Mose, Vester 

 Fælled, Amager, Damhusmose, Charlottenlund, Ordrup Mose, Erme- 

 lund, Dyrehaven, Lyngby Mose, Trørød, Tisvilde, Nyraad near Vording- 

 borg; on Lolland at Maribo, Strandby and in Kældskov; on Fejø; on 

 Langeland at Lohals; in Jutland at Horsens, Silkeborg, Randers, Jerup 

 near Frederikshavn, and on Bornholm at Hammeren. My dates are 

 ^Va — ^^h. It occurs in fens, on commons and meadows. The pupa 

 was found on the ground in Dyrehaven on '/;!, it developed on ^^/r. 

 (Kryger); the species has been bred from larvæ in flood refuse on 

 Vesterfælled, in Damhusmose and at Randers, the imagines came in 

 April and May (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. 



4. P. scutatus Meig. 



1822. Meig. Syst. Beschr. III, 333, 88 (Syrphus). — 1843. Zett. Dipt. 

 Scand. II, 751, 55 et 1859. XIII, 6003,55 (Scaeva). - 1843. Stæg. Naturh. 

 Tidsskr. IV, 322. — 1862. Schin. F. A. I, 295. — 1901. Verr. Brit. Fl. 

 VIII, 277, 6, figs. 239—240. — 1907. Kat. palåarkt. Dipt. III, 46. — Scaeva 

 alhimana p. p. 1817. Fall. Dipt. Suec. Syrph. 46. — Si/rphus quadratus 

 Macq. 1827. Soc. Se. Lille, 230, 8 et 1838. Suit. a Buff. I, 549, 49. — 

 F. quadratus 1862. Schin. F. A. I, 297. — Stjrphus sexnotatus Meig. 1838. 

 Syst. Beschr. VII, 134, 107. — 1862. Schin. F. A. I, 312. 



Male. Frons and epistoma greenish æneous, brownish yellow 

 pruinose, somewhat thinly on frons; the central knob a little shining. 

 Vertex yellow-haired, only just at the apex some dark hairs, or the 

 vertex dark-haired to a higher degree; frons black-haired ; epistoma 

 with erect, yellow hairs, sometimes some black intermingled. The 

 lower part of epistoma slightly produced, the mouth edge less pro- 

 duced than the knob. Occiput greyish yellow pruinose, with yellow 

 hairs, between which no long, black hairs. Antennæ small, yellowish 

 beneath on second and base of third joint ; arista brown at the base. 

 Thorax æneous, shining, clothed with long, yellow hairs, longest on 

 scutellum. Pleura yellow-haired. Abdomen duU black, a little shining 

 at apex; it has three pairs of not large, yellow or reddish yellow 

 spots; the first pair small, somewhat roundish, lying on the middle 

 of the segment, the second pair rectangular or quadrate, the third 

 quadrate or transverse, both near to the front margin; the fifth seg- 

 ment shows no trace of spots. Abdomen is clothed with pale yel- 

 lowish hairs, long at the sides and towards the base; the black parts 

 more or less clothed with black hairs. Venter yellowish translucent. 



