Willis Blatchley

Willis Stanley Blatchley (October 6, 1859, North Madison, Connecticut - May 28, 1940, Indianapolis, Indiana) was an American entomologist, malacologist, geologist, and author.

His home in Dunedin, Florida, the Willis S. Blatchley House, is listed on the National Register of Historic Places.

There he worked under ichthyologist David Starr Jordan and geologist John Casper Branner.

After being defeated for re-election in 1911, he retired from public office, but continued his natural history work as an amateur.

Though much of his work focused on the fauna of Indiana, he traveled to Arkansas, Alaska, Florida, Canada, Mexico, and South America (1922–23).