The Halictidae reference article from the English Wikipedia on 24-Apr-2004
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Halictidae

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Halictid bees
Image:Halictid6265.JPG
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Superfamily: Apidae
Family: Halictidae
Families


Halictidae are a family of the order Hymenoptera of small to midsize bees which are usually dark colored, often metallic. Several species are all or part green; a few are red. 

Most of the halictids nest in the ground. They are commonly referred to as halictid bees or sweat bees (especially the smaller, black species which seem attracted to perspiration and, when pinched, can give a minor sting.

Most halictid species are pollen feeders and important pollinators. A few species (in the genus Sphecodes) are wasplike in appearance and live as cleptoparasites of other bees.

Some genera:

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