yAlTOPLTJRA. 



PLATE 35.— Insects. 



Figure 



1. Larva of gnat (Culex pipiens). 



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



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

 branchiae ; 7i, tracheae. 



3. Clothes-louse (Pediadus vestimenti). 



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



5. Philopterus (DocopJiorus) communis. 



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



7. Liotheum (Menopon) pallidum. 



8. Gyropus ovalis. 



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



lary palpi ; e, setae ; /, epimera ; g, eoxre ; h, trochanter ; i, femur ; k, tibia ; 

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



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



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



12. Antenna of flea from pigeon (Pulex). 



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



14. Head of larva of Dj/tiscus marginalis. a, eyes ; b, 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 side). 



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



18. Lepisma saccharina. 



19. Larva of Oyrinus natator. 



20. Rectum of ^Jschna grandis ; 20*, portion more magnified (Libellulid^e). 



21. Pupa of Calepteryx virgo. 



22. End of abdomen of Libellula ferruginea. 



23. Sheep-tick (Melophila ovimis). 



24. Flea of the mole (Pulex). 



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



26. Head of a Lithobius (one of the Mtriapoda). 



27. Fibres of silk-worm's silk. 



28. Three lobes of the fatty body of the larva (caterpillar) of Satumia carpim. 



29. End of abdomen of ^Eschna grandis. 



30. Epidermis of cricket (Aclieta domestica). 



31. Fat-body of Ichneumon-larva, developing from cells. 



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



