Excerpt: The so-called "singing" insects are all those that make loud, rhythmical noises. They include members of three groups of Orthoptera (Gryllidae, Tettigoniidae, and Acridoidea) and one family of Homoptera (Cicadidae). There are about 300 noisy species in these four groups in eastern North America, perhaps a thousand in all of North America, and 25-30 thousand in the entire world. Only about 1000 of the world species have been studied in any detail, mostly in North America, Europe, Japan, and Australia.
Alexander, Richard D.; Pace, Ann E.; and Otte, Daniel
"The Singing Insects of Michigan,"
The Great Lakes Entomologist: Vol. 5
, Article 1.
Available at: http://scholar.valpo.edu/tgle/vol5/iss2/1