Dip:Scathophagidae
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Parallelomma paridis (Hering, 1923)
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eggs are laid in batches

 

Food Plant: Paris quadrifolia (Herb Paris)

Egg: laid on leaf in batches (average batch size about 5). The leaf above has 26 eggs (17 larvae seen in the mine)

Mine: April to May

Notes: Forms large blotch mines. The larval development si rapid (taking only 13 days). The pupal stage then lasts for around 348 days, with adults emerging in May and June. In Fauna Europea this species is considered to be conspecific with P.vittatum but Nelson (1990) gives features for distinguishing the adult flies. Found in Berkshire, Cambridgeshire, Yorkshire, Cumberland, Stirling, Perth and Forfar.

Data: 30.v.2009, Cheltenham, E.Gloucs, VC33

Image:© Robert Homan

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