  We present the results of the application of the methodology introduced by
Natarajan & Kneib (1997) to interpret local perturbations to the cluster shear
field resulting from mass associated with individual cluster galaxies. The
lensing signal is used to place new constraints on the average mass-to-light
ratio and spatial extents of the dark matter halos associated with
morphologically-classified early-type cluster members in the Abell cluster
AC114. The total mass of a fiducial $L^\ast$ cluster spheroidal galaxy is found
to be largely contained within $\sim$ 15 kpc radius halo ($\sim$~8--10 $R_e$)
with a mass-to-light ratio ${M/L_V} \sim {15^{+10}_{-4}} $ (90 % c.l.) in solar
units within this radius. Comparisons with similar estimates for field galaxies
suggests that the cluster galaxies in AC114 may possess less extensive and less
massive halos. Additionally, there is some indication that, at a fixed
luminosity, S0 galaxies are less extended than ellipticals, suggesting a
difference in the efficiency of tidal stripping for different galaxy types.
These results enable us to probe the variation of the mass-to-light ratio with
scale via gravitational lensing methods. Therefore, the prospects for
constraining the mass density of the Universe and understanding galaxy
evolution using these gravitational lensing methods are very promising.
