sugar louse

plural sugar lice

1. obsoleteA silverfish

   Thysanura […] an unimportant group, consisting mostly of very small creatures, sugar-lice and spring-tails, which live in dark, damp cellars, or in sugar stores, and can be seen hopping or springing about and shunning the light

   1879, Alexander Macalister, Zoology of the Invertebrate Animals, page 124

2. obsoleteA sugar mite

   If a spoonful of such sugar be dissolved in a small cupful of water, the dirt slowly sinks to the bottom, while sugar lice (Acari), if present, speedily come to the surface, where they swim about vigorously, their movements being apparent to the naked eye.

   1923 July 21, Geoffrey Fairrie, “A Comparison as to Purity With the Refined and Raw Products”, in Facts about Sugar, page 64