  I discuss the properties of a population of candidate cluster galaxies
recently identified in the fields of radio-loud quasars at z=1--2. The
magnitude, spatial, and color distributions of the excess galaxies in these
fields are consistent with the quasars residing in moderately rich galaxy
overdensities dominated by early-type galaxies.
  The broadband SEDs of very red galaxies in several fields suggest that there
is considerable dispersion in the properties of early-type galaxies in these
clusters at z~1.5. Most excess galaxies are best fit as 2--3 Gyr old
ellipticals, but some are either 4--5 Gyr old or considerably more metal-rich,
and others must be extremely dusty. The latter are part of a ``J-band dropout''
population which includes a number of galaxies in one field which are probably
at z~2.5, background to the quasar.
  Finally, I discuss narrowband redshifted H-alpha imaging in two fields which
has yielded at least one detection. At z>1.3 cluster galaxy star formation
rates can be measured from H-alpha in the near-IR, rest-frame 1500-Angstrom
light in the optical, and eventually rest-frame far-IR emission using SCUBA, to
help determine the star formation histories of cluster galaxies as function of
redshift.
