  We use the semiclassical approach combined with the scaling results for the
diffusion coefficient to consider the two-level correlation function
$R(\varepsilon)$ for a disordered electron system in the crossover region,
characterized by the appearance of a macroscopic correlation or localization
length, $\xi$, that diverges at the metal-insulator transition. We show new
critical statistics, characterized by a nontrivial asymptotic behavior of
$R(\varepsilon)$, to emerge on both sides of the transition at higher energies,
and to expand to all energies larger than mean level spacing when $\xi$ exceeds
the system size.
