Eucallipterus tiliae, also known as the linden aphid or lime-tree aphid, is a member of the family Aphididae. Native to Eurasia in recent times, it is now found worldwide wherever species of Tilia occur. The distribution of young and mature aphids on the leaf surfaces is dictated by their stylet length - the short stylets of young aphids cannot penetrate the lignin of the sclerenchyma of large veins and are thus restricted to feeding on smaller veins. — John Curtis in British Entomology