Author 'Gipsy34' (Id 242180 ) : 19 August 2018 : after you have submitted the leaves of the elm lace, I present to you the ugly beast that destroyed them : flying insect from 5, 5 to 7 mm long, yellow with streaks and black spots. Here is the bug from the front and in profile. The adults overwinter in the soil and emerge in early April-end of may and then feed the young leaves, mate and lay eggs from the end of may. Each female lays about 500 eggs that she laid the packet on the underside of the leaves. Less than 10 days after the larvae hatch. Very voracious, they eat away the leaf, respecting the veins of the leaves. In mid June the larvae leave the foliage to go to 'pupate' in the trunk, 10 days later the adults emerge and lay eggs and the new generation eats the leaves in August-September (photos), cutting out oval holes features. The leaves look like lace, die and fall prematurely.