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Published online by Cambridge University Press: 31 May 2012
Male.—Length 2 mm. Black, shining. Antennal plumes black; basal antennal segment dull black, segments of flagellum brownish.
Thorax black, pleural membranes brownish, dorsum greyish pollinose; scutellum and metanotum dull black with faint pollen. Halteres dark brownish with creamy white knobs.
* Contribution from the Division of Systematic Entomology, Entomological Branch, Dept. of Agric., Ottawa.