Entomology : with special reference to its biological and economic aspects . Cyllenc pictiis. A, larva; B, pnpa; C, imago, x 3. ence one could not know that they pertained to the sameindividual. Holometabola.—The more specialized insects, namely,Neuroptera, ]\Iecoptera, Trichoptera, Lepidoptera, Coleoptera(Fig. 203), Diptera (Figs. 204. 29), Siphonaptera (Fig. 30)and Hymenoptera (Fig. 280), undergo this indirect, or com-plete,^ metamorphosis, involving profound changes of formand distinguished by an pupal stage. These insectsare grouped together as Holometabola. Larvae receive such p

---

Entomology : with special reference to its biological and economic aspects . Cyllenc pictiis. A, larva; B, pnpa; C, imago, x 3. ence one could not know that they pertained to the sameindividual. Holometabola.—The more specialized insects, namely,Neuroptera, ]\Iecoptera, Trichoptera, Lepidoptera, Coleoptera(Fig. 203), Diptera (Figs. 204. 29), Siphonaptera (Fig. 30)and Hymenoptera (Fig. 280), undergo this indirect, or com-plete,^ metamorphosis, involving profound changes of formand distinguished by an pupal stage. These insectsare grouped together as Holometabola. Larvae receive such popular names as caterpillar (Lepi- ^ These terms, though somewhat misleading in impHcation, are cur-rently used. DEVELOPMENT 157 doptera), gTiil) (Coleoptera). and maggot (Diptera),while the pupa of a moth or buttertly (especially the latter)is called a chrysalis. Heterometabola.—In a grasshopper, as contrasted with abutterfly, the imago, or adult, is essentially like the young atbirth, except in having wings and mature reproductive organs,and the insect is active thr

---

Size: 1189px × 2102px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1900, booksubjectentomology, bookyear1