''Rabdophaga justini'' is a gall midge. It was first described by

Horace Francis Barnes Horace Francis Barnes ( 23 November 1902 - 5 February 1960) was an English entomologist who specialised in Diptera. From 1924 to 1927 he was a Ministry of Agriculture Research Scholar at The College of St Gregory and St Martin at Wye in England ...

in 1935. The larvae tunnel in the shoots of purple willow (''

Salix purpurea ''Salix purpurea'', the purple willow purpleosier willow or purple osier, is a species of willow native to most of Europe and western Asia north to the British Isles, Poland, and the Baltic States.Flora Europaea''Salix purpurea''/ref>Meikle, R. D ...

'').

Description

The larvae live in separate chambers under the bark of shoots of purple willow (''Salix purpurea''). Before the larvae pupate they make emergence holes which, along with some discolouration of the bark on top of the shoot, may be the only indication of their presence. The larval chamber may sometimes be found in the midrib of a leaf. Redfern et al. (2011) no longer consider ''R. justini'' to be a gall causer.

References

justini Nematoceran flies of Europe Gall-inducing insects Insects described in 1935 Taxa named by Horace Francis Barnes Willow galls {{Bibionomorpha-stub