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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Mole cricket ： ウィキペディア英語版 Mole cricket Mole crickets are members of the family Gryllotalpidae, in the order Orthoptera (grasshoppers, locusts and crickets). Mole crickets are cylindrical-bodied insects about long, with small eyes and shovel-like forelimbs highly developed for burrowing. They are present in many parts of the world and where they have been introduced into new regions, may become agricultural pests. Mole crickets have three life stages, eggs, nymphs and adults. All stages occur underground, but adults have wings and disperse in the breeding season. They vary in their diet; some species are vegetarian, mainly feeding on roots, others are omnivores, including worms and grubs in their diet, while a few are largely predacious. Male mole crickets have an exceptionally loud song; they always sing underground, in a specially constructed burrow which has the shape of an exponential horn. The song is an almost pure tone, modulated into chirps. It is used to attract females, either for mating, or for indicating favourable habitats for them to lay their eggs. ==Description== Mole crickets vary in size and appearance, but most of them are of moderate size for an insect, typically between long. They are adapted for underground life and are cylindrical in shape and covered with fine, dense hairs. The head, forelimbs, and prothorax are heavily sclerotinised but the abdomen is rather soft. The head bears two threadlike antennae and a pair of beady eyes. The two pairs of wings are folded flat over the abdomen; in most species, the fore wings are short and rounded and the hind wings are membranous and reach or exceed the tip of the abdomen; however, in some species the hind wings are reduced in size and the insect is unable to fly. The fore legs are flattened for digging but the hind legs are shaped somewhat like the legs of a true cricket; however, these limbs are more adapted for pushing soil, rather than leaping, which they do rarely and poorly. The nymphs resemble the adults apart from the absence of wings and genitalia; the wingpads become larger after each successive moult. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mole cricket」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.