We have searched for scalar muons μ , scalar electrons ẽ, and winos W̃ from the reactions e + e − → e ̃ + e ̃ − , μ + μ − , W ̃ + W ̃ − at √s ∼ 91 GeV with an integrated luminosity of 157 nb −1 . We have searched for μ + μ − , e + e − , or e− μ final states with missing transverse momentum P T > 6 GeV. These final states are signatures for the production of ẽ, μ , and W̃. We found no events. Our results are M μ > 41 GeV , M e ̃ > 41 GeV , and M W ̃ > 44 GeV at the 95% confidence level.