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Dynastes tityus
''Dynastes tityus'', the ''eastern Hercules beetle'', is a species of rhinoceros beetle that lives in the Eastern United States. The adult's elytra are green, gray or tan, with black markings, and the whole animal, including the male's horns, may reach in length. The grubs feed on decaying wood from various trees.
==Description==
Adults of both sexes are wide, and males are long,〔 including a long horn (the ''pronotal horn'') which projects forwards from the thorax of the male; a second horn (the ''clypeal horn'') projects upwards from the head.〔 ''Dynastes tityus'' is therefore "among the longest and heaviest beetles in the United States". The horns are used in battles between rival males competing for a mate;〔 the size of the horn reflects the availability of food when the beetle was growing.〔 Despite the size of the horns, ''Dynastes tityus'' is harmless to humans.〔
The elytra are green, gray, or tan, usually with black mottling.〔 The pattern of spots is unique to each individual.〔 Beetles that are found in the soil or in rotten wood often appear very dark, with the spots on the elytra obscured. This results from moisture which the shell has absorbed; when the elytra dry out, they return to their paler color.〔 Occasionally, both elytra may be a uniform mahogany color, or one elytron may be pale with dark blotches, while the other is a plain mahogany color.〔
''Dynastes tityus'' was featured on a stamp issued by the United States Postal Service in October 1999.〔
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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