Fig. 9. Phase-contrast light-microscopy images of prints left after pressing an insect cuticle against a glass slide. (A–D) Prints of adult Pameridea roridulae showing considerable fluid residues from (A) the head of a living insect, (B) the abdomen of a living insect, (C) the wing of a living insect and (D) the wing of a dry insect. (E,F) Prints of living (E) adult Calliphora vicina wing and (F) abdomen, showing only scattered micropatterns of grease residues. The arrow points to a broken bug seta leaving traces of parallel oriented lines corresponding to its helical surface texture. Scale bar, 50 µm.