- Piophila casei
- Poison apparatus of a honey bee
- Rasahus biguttatus
- Reduvius (Opsicœtus) personatus
- Salivary glands of Notonecta maculata
- Sarcoptes scabiei, female
- Sarcoptes scabiei, male
- Sarcoptes scabiei. Diagrammatic representation of the course in the skin of man
- Section through a venom gland of Latrodectus 13-guttatus showing the peritoneal, muscular and epithelial layers
- Sepsis violacea; puparium and adult
- Simulium venustum