. Journal of Agricultural Research. Journal of Agricultural Research Washington, D. C. 3 PLATE 2 Platygaster vernalis: A.—Ventral view of primary larva, showing certain outstanding features of theinternal anatom3^ such as the stomach wall and proctodaeum. X 132. B.—Mandible of primary larva. X 417- C.—Lateral aspect of mature larva. X 77- D.—Ventral aspect of head and thorax of mature larva, showing mouth and mouthparts. X 212. E.—Mandible of mature larva. X 833. F.—Maxilla of mature larva. X 833. PLATE 3 Platygaster vernalis: A.—Platygaster vernalis cocoons from a single Hessian fly puparium.
. Journal of Agricultural Research. Journal of Agricultural Research Washington, D. C. 3 PLATE 2 Platygaster vernalis: A.—Ventral view of primary larva, showing certain outstanding features of theinternal anatom3^ such as the stomach wall and proctodaeum. X 132. B.—Mandible of primary larva. X 417- C.—Lateral aspect of mature larva. X 77- D.—Ventral aspect of head and thorax of mature larva, showing mouth and mouthparts. X 212. E.—Mandible of mature larva. X 833. F.—Maxilla of mature larva. X 833. PLATE 3 Platygaster vernalis: A.—Platygaster vernalis cocoons from a single Hessian fly puparium. X 20. B.—Lateral aspect of P. vernalis pupa. X 96. C.—Ovipositor of P. vernalis. X 347- D.—Parts of ovipositor of P. vernalis, showing sheath, gorgeret, and stylet. E.—Ovary of P. vernalis. X 346. F.—Exit holes in Hessian fly puparium made by adult P. vernalis in emerging. X i3- Platygaster vernalis, Hessian Fly Parasite Plate 3.
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