Left panel: color–magnitude diagram for the morphological categories (1) dE/ETG cluster candidates (highlighted with cyan and blue dots), (2) likely background ETGs or sources with unresolved substructure, (3) cluster or background LTGs, (4) cluster or background galaxies with possibly weak substructure, and (5) likely cluster or background edge-on disk galaxies. Right panel: images of the galaxies marked with the colored crosses in the left panel and some examples of the dE/ETG candidates. All images have a size of 25 × 18″ and show the Subaru r-band data. We show the (r − z)0 vs. MV,0 diagram in Figure 19 in Appendix C.