[en] This note is an addendum to a paper recently presented by the author (Hong-Mo. Baryonium Spectroscopy as a Test for Colour Dynamics. IV European Antiproton Symposium. June 1978. CERN preprint TH2540 (1978)). Attention is drawn to a further group of experiments which yield information on the diquonium spectrum, namely e⁺e^- annihilation and diffractive photo-production, which select states with Jsup(PC) = 1^--. A spectrum of diquoniums with these quantum numbers, in which the splitting due to L . S interactions between the diquark and antidiquark have been included, is shown and discussed. (U.K.)