. Insects, injurious and beneficial, their natural history and classification, for the use of fruit growers, vine growers, farmers, gardeners and schools . around their bodies, usually first concealing themselves be-neath the fallen leaves, or entering the earth. CLASSIFICATION OF INSECTS INTO ORDERS. 39 Coleoptera (Beetles).—These insects are usually providedwith four wings, but in a few species the hind wings are want-ing. The fore wings (elytra) are of a hard, horny texture, andmeet in a straight line (suture) along the back, (except in thegenus Meloe, where they overlap each other); in a f
. Insects, injurious and beneficial, their natural history and classification, for the use of fruit growers, vine growers, farmers, gardeners and schools . around their bodies, usually first concealing themselves be-neath the fallen leaves, or entering the earth. CLASSIFICATION OF INSECTS INTO ORDERS. 39 Coleoptera (Beetles).—These insects are usually providedwith four wings, but in a few species the hind wings are want-ing. The fore wings (elytra) are of a hard, horny texture, andmeet in a straight line (suture) along the back, (except in thegenus Meloe, where they overlap each other); in a few speciesthey are united at the suture (as in some kinds of DarklingBeetles, Fig. 119). The posterior wings, when present, aremembraneous, and when not in use are usually folded bothlengthwise and crosswise, and concealed beneath the elytra.(The Beetles which belong to the same family as the Flat-headed Appple-tree Borer (Fig. 138) have the hind wingsfolded lengthwise only.) The mouth parts are fitted for complete. Fig. 141. Fig. 140. I. The larvae are commonly called grubs, and are sometimes furnished with six legs, which are placed beneath the fore part 40 NATURAL HISTORY OF INSECTS. of the body (such as the larva of the June Beetle, Fig. 139, 2);besides these some kinds have a fleshy prop-leg beneath thelast segment (as the larva of the Striped Cucumber Beetle, ). Others are entirely destitute of legs. In all of themthe head is distinct. Some undergo their transformations inthe substance in which they live; others enter the earth andspin a slight cocoon (Fig. 139, 1). The pupae have the legs,etc., enclosed in separate sheaths (Fig. 139, 1). Orthoptera, (Grasshoppers, Crickets, etc.) — The insects Fig. 142. which belong to thisorder usually havefour wings; the an-terior pair are thick-ened or parchment-Hke, and overlapeach other on theback (as those of theKatydid, Fig. 141),except in the Ear-wigs (Fig. 41).The posterior wingsare thinner, and
Size: 1072px × 2331px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectinsects, bookyear1883
