If you'd like to get into the whole "bug" world, although not even like beatles many species of tarantulas, mainly the females live quite long lives.
H. lividums (spelling?) also known as a colbat blue is quite beautiful, but burrows to much to be seen, green bottle blues are nice as well, many species of roaches are also available that breed easily, and are like beatles?
I don't know of anyway that you can get around the other problem, of their life span though man.