Nomia is a genus of sweat bees in the family Halictidae. Many species have opalescent bands on the metasoma. Nomia species are moderate-sized bees that nest in the ground. Most species nest solitarily, but some species also nest communally where females share a nest but where there are no queen or worker castes.Nomia species are found Africa, tropical Asia, Australia, and in North America.There are about 130 species world wide.

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