Four new FIR laser lines at 62.98, 48.77, 224.53, and 190.65 μm are reported from CH
3OH, optically pumped by the 10R34 and 9R10 lines of a waveguide CO
2laser. Measurements performed by several techniques confirm that the pump offsets are outside the tuning range of conventional CO
2lasers. Two of the lines are assigned as high

transitions within the torsional ground state of the CO stretch.