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Gryllotalpa orientalis
''Gryllotalpa orientalis'' is a species of mole cricket in the family Gryllotalpidae, commonly known as the oriental mole cricket. It is found in much of Asia and also in Australasia. At one time this species was misidentified as ''G. africana'' and thought to have a widespread distribution in both Africa and Asia but in the 1980s, ''G. orientalis'' was recognised as a separate species.〔(Mole Cricket Knowledgebase )〕 It is a polyphagous pest, damaging crops by gnawing their roots.〔(AgroAtlas )〕
==Morphology and biology==
This mole cricket is plump, yellowish-brown, paler beneath and about thirty millimetres long. It has short filiform antennae, forelegs designed for digging and a large oblong pronotum. The wings project slightly from beneath the forewings. After mating underground, the female builds a nesting chamber deep in the soil and lays about two hundred oval eggs which hatch after ten days. The nymphs remain in their nest for the first two or three weeks, guarded by the female.〔 A newly hatched nymph has a blueish-white prothorax and legs. Later instars are grayish-black with white markings and the last nymphal stage is similar to the adult and exhibits short wing pads.〔(University of Queensland: Centre for Biological Information Technology. )〕 The whole life cycle lasts for one to three years depending on the climatic conditions. The adults and later instar nymphs spend the winter underground at a depth of about a metre.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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