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Phyllophaga
''Phyllophaga'' is a very large genus (more than 260 species) of New World scarab beetles in the subfamily Melolonthinae. Common names for this genus and many other related genera in the subfamily Melolonthinae are May beetles, June bugs, and June beetles. They range in size from 〔〔 and are blackish or reddish-brown in colour, without prominent markings, and often rather hairy ventrally. These beetles are nocturnal, coming to lights in great numbers.
The generic name is derived from the Greek words phyllon (φυλλον), which means "leaf", and phagos (φαγος), which means "eater", with a plural ending.〔
==Life cycle==
The life cycle takes about one year. Females lay 60 to 75 eggs underground in earthen balls over a period of about two weeks in mid-summer. The white egg at first is elliptical (1.5 mm by 2.1 mm) but becomes more spherical as the larva inside develops. These hatch into white grubs about 18 days after laying. The newly hatched larva is eight mm long and grows to a length of about 40 mm. Whitish with a brownish-black head, the grub has conspicuous brown spiracles along the sides of its body. They molt twice before winter. The third larval stage lasts nearly nine months, after which they pupate. They overwinter as grubs that may become active on warm winter days. They increase their activity in the spring.
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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