. Text book of zoology. Zoology. 274 Arthropoda. chhb lai-va of 1. tapezella, -wMoli is somewhat larger, spins on tte outside of the fm-, a long thin-walled tube within which it can move about; the portion of fm- or woollen material covered by the case, is eaten away from the sui'face. 2. The "Leaf-rollers" (Tortricidx) axe, on the whole, somewhat larger than the Tineidse, the wings broader, with a shoi-ter marginal fringe. The larvse very frequently—^but by no means ia all foi-ms—live in and upon leaves which they have spun together. A larva, which is often found in the core of &quo
. Text book of zoology. Zoology. 274 Arthropoda. chhb lai-va of 1. tapezella, -wMoli is somewhat larger, spins on tte outside of the fm-, a long thin-walled tube within which it can move about; the portion of fm- or woollen material covered by the case, is eaten away from the sui'face. 2. The "Leaf-rollers" (Tortricidx) axe, on the whole, somewhat larger than the Tineidse, the wings broader, with a shoi-ter marginal fringe. The larvse very frequently—^but by no means ia all foi-ms—live in and upon leaves which they have spun together. A larva, which is often found in the core of " wonn-eaten " apples, belongs to one species of this division {Tortrix pomo- nana), other species are injui-ious forest pests (Tortrix huoliana, etc.). 3. The "Wood-borers (Xylotropha). A small family, the members of which are usually distinguishable from other Microlepidoptera by their much larger size. Here belongs the Goat-moth (Cossus ligniperda), a large, brownish-grey moth (about 80 m/m. across the wings); the larva which is almost naked, and rose-red dorsally gnaws passages in poplars, osiers, and other trees. Further, the wasp-like Clearwings (Sesia,) with transparent, almost soaleless wings, the whitish larvsB of which live in trees or in the stems of shrubs. 4. The Oase-bearers (Psyche), are charac- terised by great sexual dimorphism, the females ai-e grub-like, wings and legs are absent, whilst the males look like ordinary moths. The laiwa is suiTOunded by a sac spun out of fragments of plants or grains of sand, the female remains within this larval case. One species of the genus. Psyche helix, which forms a spiral case of fine particles of sand, usually reproduces partheno- genetically, males only appear now and again. Sub-Order 2. Macrolepidoptera. The prolegs of the larvae have a unilateral series of hooks, the head turns downwards; they lead a free life upon plants, feeding on leaves. The pupse have no transverse rows of spines on the abdomen. The
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896
