In his time men's eyes had not yet learned to see the insect world.

Insects were too small; they were well enough for amusing children, who would tie them to the end of a long thread and make them walk in circles, but they were not worthy of occupying the attention of a self-respecting man.
Pliny apparently derived the word from the country-folk, always poor observers and inclined to extravagant denominations.

The scholar accepted the rural locution, the work perhaps of the imagination of childhood, and applied it at hazard without informing himself more particularly.

The word came down to us embalmed with age; our modern naturalists have accepted it, and thus one of our handsomest insects has become the "fuller." The majesty of antiquity has consecrated the strange appellation.
In spite of all my respect for the antique, I cannot myself accept the term "fuller," because under the circumstances it is absurd.

Common sense should be considered before the aberrations of nomenclature.