[Rain Man]

Moving on...

Rho Lambda Pi
- Was a local org
- Founded 11/26/1858 at University of the Pacific
- Merged with Phi Sigma Kappa 12/3/60

Sigma Alpha
- Primary cause of decease: Weak organization
- Founded in 1859 at Roanoke College
- Had 14 chapters
- Disbanded in 1882

Sigma Alpha Theta
- Primary cause of decease: Weak organization
- Founded during the Civil War at an unknown college
- Had 3 chapters
- 2 chapters died out, one joined Delta Tau Delta in 1872 and disbanded in 1895

Sigma Delta Pi
- Primary cause of decease: Weak organization
- Founded in 1858 at Dartmouth College
- Had 3 chapters
- Two chapters died out, leaving Alpha Chapter which joined Beta Theta Pi in 1889.

Sigma Delta Rho
- Primary cause of decease: Internal dissent
- Founded 1/8/21 at Miami University
- Had 9 chapters
- Disagreement developed among its chapters as to the policies of the fraternity. This, accentuated by financial problems brought on by the Great Depression and by the absence of strong leadership, led to disintegration in 1935.
- 3 chapters joined Alpha Kappa Pi
- 1 chapter joined Pi Kappa Phi
- The rest, already threatened with dissolution, gradually disappeared.

Sigma Iota
- Primary cause of decease: Merger with Phi Lambda Alpha (which merged with Phi Iota Alpha)
- Founded in 1904 at Louisiana State University, but became a GLO in 1911.
- Had numerous chapters, including foreign chapters in Belgium, Switzerland, and Guatemala City
- Merged with Phi Lambda Alpha in 1932

Sigma Lambda Pi
- Primary cause of decease: Weak organization
- Founded April 1915 at New York University
- Had 9 chapters
- 3 chapters joined Phi Epsilon Pi
- 1 chapter became a local org and was allowed to retain the fraternity name. The other chapters died out/dissolved.

Sigma Mu Sigma
- Primary cause of decease: Merger with Tau Kappa Epsilon/stringent membership requirements shyed away many prospective members.
- Founded 1921 at Tri-State College
- Had 9 chapters
- Membership requirements included those for admittance to Phi Beta Kappa and having to be a Master Mason, which virtually proved impractical and almost impossible to join. The Phi Beta Kappa requirement was tweaked to require high scholarship record, and the Masonic requirement was tweaked to allow sons and brothers of Masons.
- Became a junior member of NIC in 1928
- Merged with TKE in 1934
- Was partially revived when remnants of the former fraternity merged with Square and Compass recognition society in 1952.

Sigma Omega Psi
- Primary cause of decease: Merger with Alpha Epsilon Pi
- Founded in 1914 at the College of the City of New York
- Had 15 chapters
- Merged with Alpha Epsilon Pi in 1940