Based on my GRE scores, looks like I qualify. However...<quoted text>
What are some of the tests accepted for admission into American Mensa?
We accept approximately 200 different test scores for Mensa membership. We do not accept tests of achievement, such as the Iowa Tests of Basic Skills and the California Tests of Basic Skills. Generally, we accept tests that measure aptitude or ability. Since this list is constantly changing as more tests are developed and reviewed, we do not have a complete list available. If your test is not listed, please contact Testing and Admissions.
"We do not accept tests of achievement.."
"...I DON'T WANT TO BELONG TO ANY CLUB THAT WILL ACCEPT PEOPLE LIKE ME AS A MEMBER" [Groucho Marx]