[en] Neutron nuclear data of ²⁴⁹Bk and ²⁴⁹Cf have been evaluated in the energy range from 10^-5 eV to 20 MeV. Evaluated quantities are the total, elastic and inelastic scattering, fission, capture, (n,2n), (n,3n) and (n,4n) reaction cross sections, the resolved and unresolved resonance parameters, the angular and energy distributions of the emitted neutrons, and the average number of neutrons emitted per fission. The fission cross sections were evaluated mainly on the basis of measured data. The other cross sections were calculated with the optical and statistical models because of scarce measured data. (author)