Snodgrass) (July 5, 1875 – September 4, 1962) was an American entomologist and artist who made important contributions to the fields of arthropod morphology, anatomy, evolution, and metamorphosis.He was the author of 76 scientific articles and six books, including Insects, Their Ways and Means of Living (1930) and the book considered to be his crowning achievement, the Principles of Insect Morphology (1935).