  Little Higgs models with T Parity contain new vector-like fermions, the T-odd
quarks or "T-quarks", which can be produced at hadron colliders with a
QCD-strength cross section. Events with two acoplanar jets and large missing
transverse energy provide a simple signature of T-quark production. We show
that searches for this signature with the Tevatron Run II data can probe a
significant part of the Little Higgs model parameter space not accessible to
previous experiments, exploring T-quark masses up to about 400 GeV. This reach
covers parts of the parameter space where the lightest T-odd particle can
account for the observed dark matter relic abundance. We also comment on the
prospects for this search at the Large Hadron Collider (LHC).
