Beris geniculata, the long-horned black legionnaire, is a European species of soldier fly.
Description Antennae long and placed in the middle of the head or just below.3rd segment of antennae long in female;in male almost two times as long as basal segments together. Thorax metallic green with black pubescence and blue reflections more apparent on the scutellum. Legs black with the knees orange; basal joint of the hind tarsi in the male moderately and equally dilated, longer, than the other four joints together. Wings of both male and female blackish. Abdomen deep dull black, slightly shining on the sides and about the tip. Epandrium with surstyli.Seguy. E. Faune de France Faune n° 13 1926. Diptères Brachycères. 308 p., 685 fig. Very similar to Beris fuscipes.George Henry VerrallStratiomyidae and succeeding families of the Diptera Brachycera of Great Britain- British flies (1909) BHL Full text with illustrations 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.
Biology The Flight period is mid May to early September.Beris geniculata is found in damp woodland and riverside habitats, where Angelica sylvestris grows
Distribution Ireland through North and Central Europe to the East Palaearctic.
References