Stephens' Gem Megalographa biloba - Distribution map

Please note that the NBN Gateway map service has been terminated as of 1 April 2017.

As soon as a replacement map service is available, distribution maps will hopefully appear here again.

In the meantime, you can get some idea of distribution from the NBN Atlas website.

View the NBN Atlas Map

73.019 BF2445

Stephens' Gem Megalographa biloba

(Stephens, 1830)

Wingspan 38-44 mm.

A rare, presumed immigrant species to the British Isles, with only a handful of examples having turned up, mainly in south-west England or west Wales. The species is a native of North America, and there is evidence that at least some records have coincided with arrivals of American birds in Britain.

Although the early stages have not been recorded in the British Isles, the species is apparently sometimes a pest of cultivated lettuce in its native land.
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