The term values for ${d}^{3}s$ and ${d}^{5}s$ have been calculated in Russell-Saunders coupling. For some of the terms of the same kind in ${d}^{5}s$, only the sum of the energies is obtained. The first approximation to the separations of the levels is also found for ${d}^{3}s$. The theoretical formulas including Ostrofsky's results for ${d}^{4}$ are then applied to the observed values of V II and Mn II.