ephemerons

Occasionally she came to a spot where independent worlds of ephemerons were passing their time in mad carousal, some in the air, some on the hot ground and vegetation, some in the tepid and stringy water of a nearly dried pool.

The Return of the Native 1878

As in the battles of ancient times, the shades of the departed were sometimes seen among the combatants, so I thought I might manage to remedy the thinness of my ranks, by conjuring up a few dead and forgotten ephemerons to fill them.

The Complete Poems of Sir Thomas Moore Collected by Himself with Explanatory Notes Thomas Moore 1815