Rabdophaga albipennis is a gall midge which forms galls on the shoots of white willow (Salix alba).
The gall is a slight swelling on a twig just below a bud on white willow (Salix alba). Inside the gall is a reddish-orange larvae which later makes an emergence hole in the twig or bud and overwinters in the gall.
The insect or gall has been found in Great Britain and Italy.