Relative size of last instar and adult soldier beetle, Chauliognathus sp.

Line art illustration of insect size in comparison with a 1-inch ruler also marked in mm, a bug box Credit: Riley CV. 1892. Larva from Directions for collecting and preserving insects. Bull. U.S. National Museum 39. The Project Gutenberg EBook. Adult from Mahr D, Mahr S. 1997. The Major Groups of Natural Enemies: Predators, Part III. Midwest Biological Control News. 4(11). Adapted by UC IPM.
Credit: Riley CV. 1892. Larva from Directions for collecting and preserving insects. Bull. U.S. National Museum 39. The Project Gutenberg EBook. Adult from Mahr D, Mahr S. 1997. The Major Groups of Natural Enemies: Predators, Part III. Midwest Biological Control News. 4(11). Adapted by UC IPM.