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This is a pupa of Megalocaria dilatata (Coccinellidae) found feeding on an aphid (Aiceona titabarensis) on a local tree (Litsea monopetala) found in Hong Kong. One day after the pupa was collected, numerous maggots emerged from the pupa as shown in the picture

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One day after emerging from the pupa, the maggots turned into pupae.

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Grateful if this parasitic fly can be identified.

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Phoridae, probably Phalacrotophora species

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Thanks Tony.