References:
Wikipedia: Mole Cricket. http://en.wikipedia.org/wiki/Mole_cricket/ (last visited Sept 22, 2011).

About.com: How Do Crickets Produce Sound?, Debbie Hadley, http://insects.about.com/od/grasshoppersandcrickets/f/howcricketssing.htm, (last visited Sept 22, 2011).