C. G.Calwers Käferbuch : Naturgeschichte der Käfer Europas : zum Handgebrauche für Sammler
Calwer's Käferbuch is a German natural history handbook of European beetles (Coleoptera) by Carl Gustav Calwer, with text by Gustav Jaeger, published by Julius Hoffmann for collectors. The four plates show beetles seen from above in flat, hand-coloured or tinted engravings with labelled numbers, giving a designer clear, schematic studies of insect form, segmented legs, and surface striations that suit scientific-chart motifs.
