PLATE 35. Insects. 



Figure 



1. Larva of gnat (Culev pipiens). 



2. Organs of larva of Agrion puella. a, ocelli ; 6, oesophagus ; c, gizzard ; c?, sto- 



mach ; e, Malpighian vessels truncated ; /, intestine and rectum ; g, caudal 

 branchiae ; 7t, tracheae. 



3. Clothes-louse (Pediculus vestimenti). 



4. Hcematopinus suis ; 4*, leg more magnified. 



5. Philopterus (DocopTiorus) communis. 



6. Trichodectes latus ; 6*, labium and labial palpi. 



7. Liotheum (Menopon) pallidum. 



8. Gyropus ovalis. J 



9. Pulex felis (flea of cat), female, a, spiracles ; b, head ; c, thorax ; d, maxil- 



lary palpi ; 0, setae ; /, epimera ; g, coxae ; h, trochanter ; {, femur ; ^, tibia ; 

 Z, tarsus ; X , pygidium ; 9 a, separate antenna. 



10. Part of Pulex canis (dog's flea), a, prothoracic setae ; 5, cephalic setae. 



11. Head of flea from common bat (PFLEX). 



12. Antenna of flea from pigeon (PTILEX). 



13. Posterior end of abdomen of pigeon's flea ; male (PULEX). 



14. Head of larva of Dytiscus marginalis. a, eyes ; 6, antennae ; c, mandibles ; 



d, maxillae ; e, maxillary papi ; /, labial palpi. 



15. Pupa of Ephemera vulgata. a, abdominal branchiae. 



16. Larva of Acilius sulcatus (formerly Dytiscus sulc.). 



17. Pupa of Agrion puella (LiBELLULma;) ; 17*, caudal branchial plate. 



18. Lepisma saccTiarina. 



19. Larva of Gyrinus natator. 



20. Rectum of ^Eschna grandis ; 20*, portion more magnified (LIBELLULID^E). 



21. Pupa of Calepteryx virgo. 



22. End of abdomen of Libellula ferruginea. 



23. Sheep-tick (MelopTiila ovinus). 



24. Flea of the mole (PULEX). 



25. Head of Geophilus longicornis (one of the MTEIAPODA). 



26. Head of a LithoUus (one of the MTBIAPODA). 



27. Fibres of silk-worm's silk. 



28. Three lobes of the fatty body of the larva (caterpillar) of Saturnia carpini. 



29. End of abdomen of JEschna grandis. 



30. Epidermis of cricket (Acheta domestica). 



31. Fat-body of /c7m6ww<M-larva, developing from cells. 



32. Egg of an aquatic insect (?) common in bog-water. 



