This video says about itself:
25 August 2014
Monday, June 29th, 2015
Soon a revision of the gall midges of the Benelux, with 11 new species for the Netherlands and 87 ones for Belgium, will appear. Gall midges are among the main producers of galls on leaves of plants. The midge Obolodiplosis robiniae which appeared first in the Netherlands as recently as 2008 proves surprisingly to be the most common species in our country.
Gall midges together with gall wasps, gall mites and gall producing fungi are the major producers of galls. The mosquitoe-like insects lay eggs in plants and the plants respond by making galls. These are fascinating structures of plant tissue, which provide food and shelter for the larvae of the midges.