The probabilities for nine electronic transitions among the low-lying excited states in the C2 molecule are calculated by the dipole-moment operator method and are given in the form of oscillator strength (or f-values). The amount of hybridization in the 2 and 3 ,' molecular orbitals are calculated with a semiempirical method closely related to the Mulliken "magic formula." The agreement between the coefficient of hybridization thus obtained and those obtained with more refined calculations is satisfactory for the 2 +0(a) ground state (the only state that could be compared). The f-values for the Swan, Deslandres-d'Azambnia, Mulliken, Fox-Herzberg, Phillips, and Ballik-Ramsay transitions are calculated as I = 0.048 (experimental 0.034), j = 0.0650, f = 0.1025, f = 0.8184, f = 0.0027, and f = 0.0066, respectively. The f-values for three additional, yet unknown, transitions between low4ying states are also reported.