1 INTRODUCTION

2 DATA AND SAMPLE SELECTION

3 STELLAR POPULATION PROPERTIES

4 THE $[\alpha/\mathbf{Fe}]$ OF QUIESCENT GALAXIES AT Z = 0.60 - 0.75

5 PROBING THE EVOLUTION OF [$\alpha$/Fe] OVER THE LAST $\sim6.5$ GYR

6 SUMMARY AND CONCLUSIONS