Pygmy borer beetles
The former Cryphalini, now spread among three tribes, are all rather tiny. Here are six species compared to a grain of wheat (bottom): top row, left to right: the coffee berry borer Hypothenemus hampei, the erudite pygmy borer Hypothenemus eruditus, and Trypodendron domesticum; second row, left to right: Eidophelus darwini, Ernoporus parvulus, and Cryphalus dorsalis. (Image by Jiri Hulcr, Ph.D.)