XVI Journal of Agricultural Research voi. xv 



Page 

 Fig. 6. Diachasma tryoni: Larva in second instar, dorsal aspect, showing 



general shape of body and food canal 424 



7. Diachasma tryoni: Mandible of second-instar larva, showing mandible 



of third instar pushing from within 425 



8. Diachasma tryoni: Larva of the third instar, dorsal aspect 425 



9. Diachasma tryoni: Mandible of third-instar larva, showing mandible 



of fourth instar pushing from within 42 5 



10. Diachasma tryoni: Third-instar larva, lateral aspect, showing digestive 



canal 426 



11. Diachasma tryoni: Larva of fourth instar, lateral aspect, showing 



complete right tracheal trunk with branches and stigmata 427 



12. Diachasma tryoni: Mattu-e larva, lateral aspect 428 



13 . Diachasma tryoni: Greatly enlarged view of spines covering surface of 



body of mature larva 428 



14. Diachasma tryoni: Head of mature larva, dorso-cephalic view 429 



15. Diachasma tryoni: Mandible of matiu'e larva 429 



16. Diachasma tryoni: Alimentary canal removed from a mature pupa, 



showing the position and shape of the meconium 43 1 



17. Diachasma tryoni: Fruit fly puparium showing emergence hole made 



by adult parasite 433 



18. Diachasma tryoni: Parts of ovipositor : A, E, lateral sheaths; B, poison 



blade; C and D, piercing blades, showing characters of ends of each 

 blade 436 



19. Diachasma tryoni: Reproductive system of newly emerged female: 



A, alkaline gland; B, poison reservoir with poison glands leading 

 to it; C, spermatheca; D, ovaries, showing position and usual 

 number of eggs and developing egg cells in newly emerged female. . . 437 



20. Opius humilis: Egg freshly laid 440 



21. Opius humilis: Mature egg 440 



22. Opius humilis: Larva of first instar, lateral aspect, showing position 



and quantity of egg serosal cells clinging to ventral surface 441 



23. Opius humilis: Larva of first instar, dorsal aspect, showing head 



characters, complete tracheal system, and digestive canal 441 



24. Opius humilis: Molted skin of first-instar larva, showing head char- 



acters 442 



25. Opius humilis: Mandible of mature larva 442 



26. Diachasma fullawayi: Freshly deposited egg 445 



27. Diachasma fullawayi: Matiu-e egg 445 



28. Diachasma fullawayi: Cast skin of flrst-instar larva, showing head 



characters and egg serosal cells still clinging to ventral surface 446 



29. Diachasma fiillaivayi: Mandible of mature larva 447 



30. Tetrastichus giffardianus: Egg newly deposited 449 



31. Tetrastichus giffardianus: Newly hatched larva 449 



32. Tetrastichus giffardianus: Pupae in normal position and number in 



fruit-fly puparium opened to show contents 450 



2Z- Tetrastichus giffardianus: Fruit-fly puparium showing characteristic 



emergence hole made by adult parasite 451 



34. Diachasma tryoni: Dead encysted egg removed from melon-fly pupa. . . 455 



35. Tetrastichus giffardianus: Dead encysted cluster of eggs removed from 



melon-fly pupa 456 



36. Galesus silvestrii: Egg, i day old 458 



37. Galesus silvestrii: Newly hatched larva 458 



38. Caksiis silvestrii: Larva of second instar 459 



• 39. Galesus silvestrii: Mandible of matm-e larva 459 



