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Megachilidae
The Megachilidae are a cosmopolitan family of (mostly) solitary bees whose pollen-carrying structure (called a ''scopa'') is restricted to the ventral surface of the abdomen (rather than mostly or exclusively on the hind legs as in other bee families).
Megachilid genera are most commonly known as mason bees and leafcutter bees, reflecting the materials from which they build their nest cells (soil or leaves, respectively); a few collect plant or animal hairs and fibers, and are called carder bees. All species feed on nectar and pollen, but a few are cleptoparasites (informally called "cuckoo bees"), feeding on pollen collected by other megachilid bees. Parasitic species do not possess scopae. Megachilid bees are among the world's most efficient pollinators. The motion of megachilidae in the reproductive structures of flowers is highly energetic and swimming-like. This vigorous agitation releases large amounts of pollen. Megachilidae also require an average of ten times as many trips to flowers as other bee species to gather sufficient resources to provision a single brood cell.
==Lifecycle ==
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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