John Lawrence LeConte named and described about 5000 species of beetles in the Unted States, and was the foremost authority on beetles in his lifetime (he died in 1883); the Amphizoa  are also known as troutstream beetles that are found in streams and rivers in mountain regions of the US, China and North Korea.
John Lawrence LeConte (May 13, 1825  November 15, 1883) was an American entomologist of the 19th century, responsible for naming and describing approximately half of the insect taxa known in the United States during his lifetime, including some 5,000 species of beetles. He was recognized as the foremost authority on North American beetles during his lifetime, and has been described as "the father of American beetle study." November 15, 1883(1883-11-15) (aged 58) They are sometimes referred to by the common name troutstream beetles. Troutstream beetles can be found in streams and rivers in mountain regions of China, North Korea and western North America. Native to North America from Alaska to southern California. Found in western North America, especially in the Rocky Mountains. 
