21 G Syrphidae. 



Damhusmosen, Utterslev Mose (Schlick), Ordrup Mose, Lyngby Mose. 

 Bagsvær, Frederiksdal, Ørholm (the author); ori Lolland in Kældskov 

 and Dødemose west of Nysted (L. Jørgensen). My dates are ^^le—^^lv. 

 It occurs in fens and on meadows, and I haven taken it flying in 

 high grass. It has been bred from larvæ in flood refuse from Damhus- 

 mosen and Utterslev Mose, the imagines came in May (Schlick). 



Geographical distribution: — Northern and middle Europe, and 

 recorded down into Italy; towards the north to middle Sweden, but 

 rare, and in Finland and Siberia. 



9. P. clypeatus Meig. 



1822. Meig. Syst. Beschr. III, 335, 90 (Syrphus). — 1843. Zett. Dipt. 

 Scand. II, 748,51 et 1849. VIII, 3145, 51 et 1859. XIII, 6001, 51 (Scaeva). 

 — 1843. Stæg. Naturh. Tiddsskr. IV, 323. — 1862. Schin. F. A. I, 296. — 1901. 

 Verr. Brit. Fl. VIII, 293, 13, figs. 252—253. — 1907. Kat. palåarkt. Dipt. III, 

 43. — Scaeva albimana p. p. 1817. Fall. Dipt. Suec. Syrph. 46. — Syrphus 

 dilatatus Macq. 1834. Suit. å Buff. 1, 547,45. — 1838. Meig. 1. c. VII. 138, 115. 



Male. Frons and epistoma greenish black, the former almost not 

 pruinose, the latter somewhat thinly grey pruinose, the central knob 

 bare. Epistoma rather flat, the knob slightly prominent. Vertex yelloM^- 

 haired or with a few darker hairs quite in front; frons and epistoma 

 black-haired or the latter paler-haired, especially below. Occiput greyish 

 pruinose, the hairs all yellow. Antennæ black, somewhat large, third 

 joint a little longer than broad; arista of the length of the antennæ 

 or scarcely so. Thorax greenish æneous, shining, with longish, yellow 

 hairs. Pleura with long, yellow hairs. Abdomen dull black, slightly 

 shining at base and apex; it has three pairs of yellow or reddish yel- 

 low spots; first pair more or less small, roundish or a little triangular, 

 lying behind the middle of the segment, second and third pairs close 

 to the front margins, second pair rectangular, third pair shorter, more 

 quadrate, going over the side margin, both pairs with the inner hind 

 corner rounded; tifth segment with small or indistinct reddish spots 

 at the basal corners. Abdomen is clothed with short, yellow hairs, 

 longer at the sides and rather long towards the base; on the black 

 parts partly black hairs. Venter translucent, with long, pale hairs. 

 short on fourth segment. Legs yellowish, front femora more or less 

 darkened behind towards above and middle femora above and below 

 in the apical half or two thirds; hind femora black with base and 

 apex yellow, the base sometimes indistinctly, hind tibiæ with a broad 

 black ring and hind metatarsus and the two last joints black. Front 

 troclianters with a row of small, inconspicuous yellow bristles below ; 

 front femora with the peculiar, white, curled hair at the base on the 



