Carriers of 4964 and 6196 diffuse interstellar bands and environments
  dominated by either CH or CH$^{+}$ molecules
  The analysis of radial velocities of interstellar spectral features: CH,
CH$^{+}$ as well as 4964 and 6196 diffuse interstellar bands, seen in spectra
of HD 151932 and 152233, suggests that carrier of the former is spatially
correlated with CH while that of the latter -- with CH$^{+}$. A further
analysis, done in this paper and based on the sample of 106 reddened OB stars,
partly confirms this suggestion, showing that the CH column density correlates
indeed much better with the equivalent width of the 4964 DIB than with that of
the 6196 DIB. However, the strengths of the 6196 DIB correlate only marginally
better with CH$^+$ than with CH.
