Hylaeus (Colletidae) is well known to nest in various preformed cavities. It is most commonly reported in hollow stems ( Stoekhert, 1933; Malyshev, 1936; Michener, 1965; Stephen et al., 1969) but also may occupy cynipid wasp galls (Stoekhert, 1933; Laroca, 1971) and dead wood (Perkins, 1899; Michener, 1965). However, nest sites are not limited to plant materials. Smith (1855) reported cells in hollow pieces of "flint stone"; Ferton ( 1932), in earthworm burrows; and Perkins (1899), in ground. The present paper concerns nests of H. bisinuatus in burrows of a balictine bee in an earthen bank; this is the first record of Hylaeus occupancy of nests of another hymenopteran.
Barrows, Edward M., "Occupancy by Hylaeus of Subterranean Halictid Nests (Hymenoptera: Apoidea)" (1975). Ba. Paper 61.
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