370 Syrphidae. 



there are five normal segments, the sternites of which are more like 

 the tergites in size, only miich narrower; at the end two or three 

 small segments may be more or less visible, the last terminating with 

 two small lamellæ. Legs with the hind femora thickened and clavate^ 

 hind tibiæ somewhat dilated and curved towards the end, and hind 

 metatarsi thickened. Legs short-haired, hind femora with bristles below. 

 Glaws and pulvilli small; empodium not quite short, bristle-shaped 

 and with microscopical bristles. Wings somewhat long; medial cross- 

 vein well before the middle of the discai cell; upper marginal cross- 

 vein with a round curve below, but the upper angle rectangular, the 

 lower cross-vein oblique with the lower angle obtuse; cubital vein 

 ending below the apex of the wing; radial vein issuing rather basally; 

 vena spuria very weak, almost not visible behind the medial cross- 

 vein; no anal fold discernible. Alula very narrow, almost wanting. 

 Squamulæ narrow, the alar squamula with short, simple hairs, the 

 thoracai squamula very narrow at the base, a little triangularly dilated 

 towards the angulus; it has long hairs, which are simple on the basal 

 part, but towards the angulus long and divided furcately several times. 

 Plumula very small, almost rudimentary, with simple hairs (as far as 

 I could see). 



The developmental stages are not known. 



The species of Sphegina are characteristic by their narrow, some- 

 what Ichneumon-\ike shape; the genus is, as said, somewhat related 

 to Baccha, but differs in many characters as the separated eyes in 

 the male, the epistoma without central knob, the perpendicular meta- 

 sternum, only four not transformed abdominal segments in the male, 

 the thickened hind femora and the wing-venation. The species occur 

 in woods and thickets on somewhat shaded, humid piaces, where they 

 are found in low herbage; their flight is not quick. 



The species are somewhat varying, 6 are recorded from the 

 palæarctic region, but one or two, at least, are doubtful; Verrall says: 

 "I should not be surprised if the whole genus resolved itself into one 

 species, S. clunipes". In Denmark certainly only one species, S. clunipes^ 

 occurs. 



1. S. clunipes Fall. 



1816. Fall. Dipt. Suec. Syrph. 12, 10 (Milesia). — 1822. Meig. Syst. 

 Beschr. III, 194, 1, Tab. XXVIII, Fig. 5. - 1843. Zett. Dipt. Scand. II, 

 891, 1 et 1849. VIII, 3196, 1 et 1859. XIII, 6043, 1 — 1862. Schin. F. A. I, 

 323. — 1901. Verr. Brit. Fl. VIII, 464, 1, figs. 326—327. — 1907. Kat. 

 palåarkt. Dipt. III, 83. — S. nigra Meig. 1822. 1. c. 111, 195,2. — 1843. 

 Zelt. 1. c. II, 891, 2 et 1849. VIII, 3196, 2. — S. nigricornis Macq. 1827. 

 Soc. Se. Lille, 166, 2 et 1834. Snit. k Buff. I. 576, 2! — 1838. Meig. 1. c. 



