1. INTRODUCTION

2. SN IA HOSTS
2.1. SN typing by host
2.2. Dust in early-type SN Ia hosts
2.3. SN Ia properties by host
2.4. The HST Cluster SN Survey

3. DATA
3.1. Image reduction and photometry
3.2. Quantitative morphology
3.3. Spectroscopy

4. ANALYSIS
4.1. Quantitative morphology calibration
4.2. The composite red sequence
4.3. Individual cluster red sequences

5. SN HOST CLASSIFICATION

6. SN TYPING BY HOST GALAXY

7. EARLY-TYPE HOST DUST CONSTRAINTS
7.1. Red-sequence scatter
7.2. Dust scatter
7.3. Absolute scale for dust

8. SN IA CORRELATIONS WITH HOST GALAXIES
8.1. Stretch and color
8.2. SN Ia Hubble residual vs. host mass

9. DISCUSSION AND CONCLUSIONS