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A large bee that resembles the bumblebee but lacks pollen-collecting apparatus and a worker caste
Answer for the clue "A large bee that resembles the bumblebee but lacks pollen-collecting apparatus and a worker caste ", 9 letters:
psithyrus
Word definitions for psithyrus in dictionaries
Wikipedia
Word definitions in Wikipedia
Cuckoo bumblebees are members of the subgenus Psithyrus in the bumblebee genus Bombus . Until recently, the 29 species of Psithyrus were considered to constitute a separate genus. They are a specialized lineage which has lost the ability to collect pollen ...