  We report inelastic light scattering experiments in the fractional quantum
Hall regime at filling factors $\nu\lesssim1/3$. A spin mode is observed below
the Zeeman energy. The filling factor dependence of the mode energy is
consistent with its assignment to spin flip excitations of composite fermions
with four attached flux quanta ($\phi$=4). Our findings reveal a composite
fermion Landau level structure in the $\phi$=4 sequence.
