| Various types such as guest ants, temporary parasites, inquilines or permanent social parasites, and slave-makers or dulotic species are known. |
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| Two of the three remaining Holarctic species are social parasites, inquilines, which have different hosts in the Nearctic and Palearctic Regions. |
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| Most sphecine genera nest in cavities in the ground, although some nest aerially and a few are inquilines. |
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| North American Myrmecophilus species are inquilines that inhabit the nests of many ant species. |
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| Phytophagous forms are known from at leas t six plant families and most often attack seeds and stems or live as inquilines in galls formed by other insects. |
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