In this paper the rule of homologous linearity for electronic spectra, namely,v=a+b (1/α)^2/N has been extended to the homologous series of P-polyphenyls and cats-and pori-condensed aromatic hydrocarbons.For genuine homologous of the latter type, namely, condensed aromatic compounds of the same general structural formula and also with the same number of aromatic sextets, all the absorption peaks in each band of their electronic spectra conform alike to the linearity rule.The correlations are very satisfactory in almost all the cases studied.Furthermore, the linearity of the homologous lines obtained in this work is shown to be superior in precision to that based on the transition energies (m_m+1-m_m)calculated by the Hueckel molecular orbital method.