EXUVIAE • DICTIONARY ONE.COM • Definition of Exuviae

... whenever ants appear, will have the desired effect; but whether these insects are injurious to the tree or not, is to be doubted upon this principle, namely, that the ant, being excessively carnivorous, is instinctively led to the orange tree in quest of the eggs, exuviae, larvae, etc. of some very minute insect, whose eggs are attached to the leaves by a glutinous substance, emitted by themselves in such quantity as to discolour the leaf, the pores of which being thus stopped, it becomes hard and tusky, and gradually closes. It seems impossible ...

— Statistical, Historical and Political Description of the Colony of New South Wales and its Dependent Settlements in Van Diemen's Land • William Charles Wentworth