. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . The Hessian-fly, Cecidomyia destynctor.—On the left a healthy stalk of wheat, and on the right one infested at li by Hossian-fly, sho\vinjj;the galls, a, egg; b, larva; c, "flaxseed;" d, pupa, all very much enlarged ; e, fly ovipositing on leaf, natural size ; /, female, and g, male Hessian-fly, much enlarged ; :', the parasite, Merims destructor, much enlarged. 22 337

---

Size: 1790px × 2792px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1900, booksubjectentomology, bookyear1