. Elementary entomology . Fig. 132. Dragon-fly [Libelhdapulchella). (Slightly reduced) A, last nymphal skin ; i?, adult. (After Folsom) Summary of the Nerve-Winged Insects and their Relatives A. With complete metamorphosis: Order Nenroptera. Wings equal; numerous cross veins. The dobsons {Sialidae). Larvae aquatic. The aphis-lions {Chrysopidae). Feed on aphides, etc. The ant-lions [Afyr/neleonidae). Larvae make pits in soil. Order Mecoptera. Scorpion-flies. Elongate head, and tip of abdomen fang- like. Larvae live underground. Order Trichoptera. Caddis-flies. Wings with few cross veins and clo
. Elementary entomology . Fig. 132. Dragon-fly [Libelhdapulchella). (Slightly reduced) A, last nymphal skin ; i?, adult. (After Folsom) Summary of the Nerve-Winged Insects and their Relatives A. With complete metamorphosis: Order Nenroptera. Wings equal; numerous cross veins. The dobsons {Sialidae). Larvae aquatic. The aphis-lions {Chrysopidae). Feed on aphides, etc. The ant-lions [Afyr/neleonidae). Larvae make pits in soil. Order Mecoptera. Scorpion-flies. Elongate head, and tip of abdomen fang- like. Larvae live underground. Order Trichoptera. Caddis-flies. Wings with few cross veins and clothed with hairs. Larvae live in water, many being case bearers. B. With incomplete metamorphosis {Psendo/ieuroptera): Order Ephemerida. May-flies. Fore-wings much larger ; mouth-parts rudi- mentary. Nyrrlphs aquatic. Order Plecoptera. Stone-flies. Hind-wings larger and plaited beneath the fore-wings when at rest. Nymphs aquatic. Order Odonata. Dragon-flies and damsel-flies. Wings about equal in size, with a nodus on the front margin. Nymphs aquatic.
Size: 3532px × 1415px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
