Comprehensive Description

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Differential diagnosis

The subgenus Leucozona s. str. differs by having abdomen oval, marginated; 2nd tergum mainly white, grey or pale yellow, with a medial lack vitta; 3rd and 4th terga black (sometimes anterior margin of 3rd tergum whitis); and wing with a medial dark macula. The subgenus Ischyrosyrphus has abdomen parallel-sided, mostly unmarginated (sometimes with very weak margin on terga 4th and 5th); tergum 2 black with pair of large subbasal subquadrate pale maculae, medially joined or not; 3rd and 4th terga with small pale maculae; wing without dark macula, except dark stigma.

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© Mengual, Ximo

Source: Flower flies (Syrphidae)

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