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Multiple little pimple galls on the upper surface of leaves showing clean cut holes in the centre. All the galls seemed to have a thick collar and a thinner translucent rounded part arising from within. The underside of the leaf (pic #4) showed corresponding bulges.
Leaves of a Eucalyptus tree - species unknown
Galls with clean-cut exit holes probably made by small hemipterans of the family: Eriococcidae. The ID needs confirmation.