The energies of the five lowest 4S and 4P0 states for three-electron ions for 3 52 5 10 have been calculated by the Hylleraas method. The largest basis set used contained 97 terms with odd as well as even powers of rip The change of scale r' = Zr was applied to the Hamiltonian so that the same basis sets could be used for all the three-electron ions leading to great savings in computing time.