52 Syrphidae. 



hairs dark. Antennæ longer, third joint more than twice as long as 

 broad. Thorax and pleura white-haired and with shorter hairs than 

 in the male. Abdomen more bluish, with two almost circular, yellow 

 or reddish spots on the middle of second segment. Abdomen haired 

 as in the male, but the white hairs more extended. Femora shorter- 

 haired, and all white-haired. The wings may be a little more tinged, 

 and the upper marginal cross-vein is more perpendicular, Squamulæ 

 white, 



Length 5,5 — 6,5 mm. 



P. fiavitarsis is not common in Denmark ; Ordrup Mose, Dyre- 

 haven, Lyngby Mose, Birkerød, Nyraad near Vordingborg and on 

 Funen at Veflinge. My dates are '^/e — ^/s. Zetterstedt records (VIII) 

 that Stæger has taken it in copula. 



Geographical distribution: — All Europe; towards the north to 

 southern Sweden, and in Finland. 



3. P. Heringi Zett. 



1843. Zett. Dipt. Scand. II, 844, 24 et 1852. XI, 4307, 24 et 1859. 

 XIII, 6032, 24 (Pipiza). — 1862. Schin. F. A. I, 260. — 1901. Verr. Brit. 

 Fl. VIII, 159, 4, figs. 181—85. — 1907. Kat. palåarkt. Dipt. III, 6. — 

 Pipiza geniculata Zett. 1843. Dipt. Scand. II, 839,18. — Pipiza leucogona 

 Zett. 1849. ibid. VIII, 3185, 18. — Heringia Zetterstedtii Rond. 1856. Dipt. 

 ital. Prodr. I, 53 et 1857. II, 185, 1. — 1885. Kow. Wien. ent. Zeitg. 

 IV, 241. 



Male. Vertex, frons and epistoma æneous black; vertex with yel- 

 low, frons with black hairs; epistoma white-haired. The eye-suture 



Fig. 14. Antenna of P. Heringi cJ", from the inside. X 80. 

 (From a German specimen). 



about as long as the vertical triangle. Occiput æneous black, a little 

 pruinose, with yellow hairs, above there are some black hairs inter- 

 mingled. Eyes densely hairy with pale, somewhat short hairs. Antennæ 

 not long, third joint one and a half times a long as broad or fully 

 so; they are black or blackish, third joint inconspicuously reddish 



