a, larva; b, cocoon.
Rose-chaffer (Cetonia aurata), an injurious beetle, whose grubs destroy the roots of straw- berries and other plants, while the adults spoil the flowers of roses, strawberries, and seed-turnips. The eggs are laid in the ground; the full-grown grubs are whitish and about an inch and a half in length; after two or three years they pupate inside earthen cocoons. The adults, which are well able to fly from place to place, measure about an inch in length, are golden green above, coppery with a tint of rose beneath. Where they are likely to do harm the adults and grubs should be collected and destroyed, and recourse may be had to remedies similar to those used against cockchafers.—The 'rose-bug' of the eastern United States is another beetle (Macrodactylus subspinosus), a voracious pest which often appears in immense numbers and destroys the flowers of rosaceous plants.