Platychims. 197 



— Vertex about one fifth of the breadth of the head, dull; 



length 5,5 — 6 mm 11. sticticus. 



10. Abdomen with four pairs of spots; epistoma rather pro- 



truding below 3. peltatus. 



— Abdomen with only three pairs of spots; epistoma rather 



flat 4. scutatus. 



1. P. manicatus Meig. 



1822. Meig. Syst. Beschr. III, 336, 91 (Stjrphus). - 1838. Zett. Ins. 

 Lapp. 606, 33 et 1843. Dipt. Scand. II, 745, 48 et 1849. VIII, 3144, 48 

 (Scaeva). — 1843. Stæg. Naturh. Tidsskr. IV, 321. — 1862. Schin. F. A. I, 

 294. — 1901. Verr. Brit. FL VIII, 266, 1, figs. 229-230. — 1907. Kat. 

 palåarkt. Dipt. III, 44. — Eristalis geniculata Zett. 1838. Ins. Lapp. 612, 12 et 

 1843. Dipt. Scand. Il, 812, 37 et 1849. VIII, 3174, 37, ?, (nec XII, 4669, 

 37, c?). — 1894. Beck. Nov. Aet. Leop. Garol. Akad. LXII, 249. 



Male. Frons brownish yellow pruinose; vertex and frons black- 

 haired. Epistoma greenish black, densely yellow pruinose, with longish, 

 yellow hairs, the central knob shining. The lower part of epistoma 

 with the central knob much protruding, and the upper mouth edge 

 more protruding than the knob; the lateral angles of the mouth edge 

 somewhal descending; the epistoma a httle widening downwards. 

 Occiput greyish yellow pruinose, the hairs whitish below, yellow above, 

 and here besides long, black hairs; behind the vertex long, yellow 

 hairs. Antennæ somewhat small, black. Thorax æneous or dark 

 æneous green, slightly shining, dull or dullish but more shining on 

 the posterior part and especially on scutellum ; it has generally some 

 faint traces of darker and duller stripes, especially one on the middle. 

 Thorax is clothed with long, yellow hairs, longest posteriorly and on 

 scutellum; there are some black hairs intermingled, most numerous 

 on the posterior part and scutellum, and there is also generally an 

 indication of a longitudinal stripe of black hairs on each side. Pleura 

 yellow-haired. Abdomen dull black, a little shining at base and apex; 

 second segment with two widely separated, elongated triangular, yel- 

 low to reddish spots, narrowed in front; third segment with two 

 elongated, subquadrate spots, reaching from the front to near the 

 hind margin with the inner hind corner rounded, and leaving less 

 than one third of the breadth of abdomen black; fourth segment with 

 similar spots and the fifth more or less yellowish at the sides; the 

 spots do not touch the side margin. Pubescence yellow, long at the 

 sides, shorter above and here more or less black on the middle line. 

 Venter yellowish, generally somewhat darkened and pruinose behind, 

 with long, pale hairs, short on fourth segment. Legs blackish, apex 

 of femora and basal part of tibiæ yellow but on the hind legs narrowly; 



