The species is closely allied to C. polygama Guen. Its distinctive features may be more clearly appreciated by a differential cotnparison with that species. The basal region is conspicuously and broadly shaded with black, deepening toward the anterior transverse line ; in polygama, shaded with ferruginous. The anterior transverse line is moderately oblique in its general direction, tending to the posterior third of the internal margin, geminate, distinctly separated by white below and slightly above the submedian : in polygama the line is quite oblique, tending to, or very near to, the internal angle; preceded below the submedian by gray and ferruginous scales.