Comprehensive Description

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Differential diagnosis

Melangyna species have eye bare, with short sparse hairs, or with abundant distinct hairs; face always at least slightly broadened below, tubercle always well developed, face at most slightly prominent below, rarely entirely yellow, usually with distinct and often broad black medial vitta, sometimes darkened laterally and yellow-brown ground colour scarcely visible; scutum black, shining or sub shining, sometimes slightly or densely pollinose laterally, never yellowish laterally; scutellum dull yellow toblackish brown, but never metallic; pleura black, shining or pollinose, at most with obscure yellowish area on posterodorsal part of anepisternum; katepisternal pile patches usually broadly or moderately broadly separated, rarely narrowly joined posteriorly; metacoxa with tuft at posteroventral apical angle; terga 2 to 4 with transverse yellow maculae which are always well separated, usually sub rectangular, occasionally broadened laterally but never oblique; maculae of tergum 2 usually narrower than those of tergum 3, rarely much larger and subquadrate; very rarely maculae of tergum 2, or all pale abdominal markings, completely absent; sterna with black fasciae or entirely darkened (from Vockeroth 1969).

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© Mengual, Ximo

Source: Flower flies (Syrphidae)

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