Diptera: Cecidomyiidae - gall midge Rabdophaga albipennis Gall on Salix alba var. vitellina, Golden Willow / Yellow Basket Willow Hosts: Salix alba Forms a weak swelling on one side of a young stem below a bud, the single orange-red larva pupating in the gall Similar:R. deletrix. Elliptic swelling just below a bud on a young stem, the wide chamber containg a single yellow larva. On S. alba, fragilis, viminalis. Not so far recorded in Britain or Ireland.

Below: larva with a parasitoid

Rabdophaga albipennis
Poole Park, Dorset. March 2018