328 Habits of certain species of Earijtomides. 



Explanation of Plates. 



PLATE XIII. 



Fig. 1. Isosoma orchidearum, male, magnified. 



2. Antenna ; and 3, ceratotheca of flagellum of ditto. 



4. Isosoma orchidearum, female, magnified. 



5. Antenna ; and 6, ceratotheca of flageUum of ditto. 



7. Fore leg of ditto. 



8. Portion of stem of an Orcliideous plant, with weevil larva 



and parasitic pupae i?i situ. 



9. Bud of Brazilian Cattleyla, with pupae of Isosoma orchide- 



arum. 



10. Buds of Cattleyla, with larvie oi Isosoma orchidearimn. 



11. Larva of ditto, magnified. 



12. Head of larva, seen sideways, rather obliquely. 



13. Front of ditto, with bidentate mandibles. 



14. Pupa of Isosoma orchidearum. 



PLATE XIV. 



15. Maxilla and labium of male Isosoma sp. ; reared from 



peppercorn-galls on under side of oak-leaves ; and 

 15(1, mandible of ditto. 



16. Ovipositor of female of ditto. 



17. Penis of male of ditto, with its two claspers. 



18. Larva of Isosoma hordei, after Fitch. 



19. Antenna of larva of ditto. 



20. Mandibles of ditto. 



21. Penis oi Platymesojms aplcalis, male, and its appendages. 



22. Middle tibia and tarsus of ditto. 



23. Eurytoma taprohanica, male. 



24. Antenna of ditto. 



25. Eurytoma taprobanica, female. 



26. Antenna of ditto. 



27. Bracon sculptilis. 



