  New results from the CDF Collaboration on the invariant mass distribution of
dijet events observed at the Tevatron are used to constrain the masses and
couplings of new gauge bosons ($W'$ and $Z'$) as well as fundamental diquarks
which can occur in some extended electroweak models. In the case of new gauge
bosons, these new bounds are then compared to existing limits which arise from
searches for the leptonic decay modes of these particles at the Tevatron.
