Pachygaster leachii, the yellow-legged black, is a European species of soldier fly.
Description A minute fly of brilliant black color with a round abdomen and a body length of around 2.5-3.5 mm. The eyes are brown-red in males and obscure green in females. Both males and females have yellow antennae. The legs are of a pale yellow with a blackish ring, sometimes quite wide, at the apex of femora III. It has yellowish wings with pale veins. The halteres are yellowish-brown at the base.Seguy. E. Faune de France Faune n° 13 1926. Diptères Brachycères.308 p., 685 fig.E. P. Narchuk in Bei-Bienko, G. Ya, 1988 Keys to the insects of the European Part of the USSR Volume 5 (Diptera) Part 2 English edition. Keys to Palaearctic species but now needs revision.William Lundbeck Diptera Danica. Genera and species of flies Hitherto found in Denmark. Copenhagen & London, 1902-1927. 7 vols
Biology The habitat is woodland with oak and elm. Associated with alder, hazel. The flight period is from June to August.
Distribution Andorra, Austria, Azerbaijan, Belgium, Bulgaria, Czech Republic, England, France, Georgia, Germany, Hungary, Ireland, Italy, Netherlands, Poland, Portugal, Romania, Russia, Slovakia, Spain, Sweden, Switzerland, Wales, Yugoslavia.
References
External links Images representing Pachygaster leachii at Bold