Wing-covers and hind-wings are alike absent, and the latter are represented by a pair of little knobbed organs, the halteres or balancers, which have a controlling and directing function in flight. [Please select]
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Abdomen ochraceous, black at the tip; femora testaceous at the base; halteres testaceous. [Please select]
Head smooth; antennæ piceous; tarsi whitish; wings blackish cinereous, veins black; halteres snow-white. [Please select]
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Head rather prominent; antennæ tawny towards the base, shorter than the breadth of the head; spines of the scutellum, abdomen beneath, tibiæ, tarsi, and halteres tawny; wings limpid, veins testaceous. [Please select]
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_ Coal-black, shining; antennæ tawny; thorax slightly tomentose; spines of the scutellum and legs white; wings blackish grey, paler towards the hind border, veins black; halteres testaceous. [Please select]
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