206 Syrphidae. 



Geographical distribution: — Europe down into Italy; towards 

 the north to northern Sweden, -and in Finland. 



5. P. albimanus Fabr. 



1781. Fabr. Spec. Ins. II, 434, 63 et 1794. Entom. Syst. IV, 310,117 

 {Syrphus) et 1805. Syst. Antl. 253,23 {Scaeva). — 1817. Fall. Dipt. Suec. 

 Syrph. 46, 19, p. p. {Scaeva). — 1822. Meig. Syst. Beschr. 111, 333, 87 

 {Syrphus). — 1843. Zett. Dipt. Scand. II. 752,56 {Scaeva). — 1843. Stæg. 

 Naturh. Tidsskr. IV, 326. — 1862. Schin. F. A. I, 294. — 1901. Verr. Brit. 

 FL VIII, 280, 7, figs. 241—244. — 1907. Kat. palåarkt. Dipt. III, 42. — 

 Musca ctjanea O. F. Mull. 1764. Fn. Fridrichsd. 85, 761.' 



Male. Frons and epistoma greenish black, thinly brownish pruinose, 

 somewhat shining, central knob not pruinose; vertex black-haired, 

 behind the ocelli yellow-haired ; frons and epistoma all black-haired. 

 The lower part of epistoma with the central knob a little produced. 

 Occiput grey pruinose, the hairs whitish below, yellow upwards and 

 here besides a few long, black hairs. Antennæ smallish, yellowish 

 beneath the base of the third joint, but often somewhat indistinctly. 

 Thorax æneous, shining but not brightly, clothed with long, yellow 

 hairs, longest on scutellum and here black on the posterior part; at 

 the sides of the disc are also blackish hairs tending to form two 

 longitudinal stripes. Pleura Avith pale hairs. Abdomen dull black, 

 the very base and the fifth segment shining; it has three pairs of 

 æneous spots, the first pair in the middle of the segment, the two 

 other pairs somewhat triangular or more sub(|uadrate, placed near 

 the front margin, all continuous with the shining æneous side margin ; 

 the spots are hoary but in a different way according to the direction 

 in which they are seen ; when seen from behind the inner part of the 

 spots is hoary, but when seen from in front it is the outer part which 

 is hoary; the basal spots only slightly hoary. The pubescence is long 

 and yellow at the sides towards the base, short in the middle and 

 here mainly black on the black parts. Venter yellowish or æneous 

 black, shining, with long, pale hairs, shorter towards the end. Legs 

 black or blackish and yellow; front femora yellow at apex, and at 

 the base on the anterior side, and also with a pale patch on the 

 posterior side inclosing two black spots; front tibiæ and tarsi mainly 

 pale; middle legs with the knees and apex of tibiæ yellowish, and the 

 tarsi pale yellowish, more or less brownish towards the end; hind 

 legs with only the knees yellowish; sometimes the dark parts of the 

 legs are rather brown or pale brown. Front trochanters with very 

 short and inconspicuous, pale hairs; the front femora have on the 

 posterior side at the base a long, white, somewhat curled hair, con- 

 sisting of several united hairs, with the apex bent forwards: then 



