Genera des coléoptères d'Europe, Paris, Chez A. Deyrolle, 1857-1868, Beetles, Europe, Pictorial works, The illustration features a collection of beetles from the genus Cactophagus, presented in a structured layout. Each specimen is depicted alongside a corresponding number for identification, with clear attention to detail showcasing the distinct shapes and colors of the beetles. The top row includes a reddish beetle, a yellowish one, and a dark-colored variant, while the bottom row features a striking black beetle and an identically shaped one in a more muted hue. Each beetle is displayed against a plain background, emphasizing their unique characteristics and making it easy to compare their forms. Accompanying text provides scientific nomenclature and classification details, reflecting the meticulous nature of entomological study.