| Streszczenie: | Over 200 specíes of mites heve been coliected from passalíd beetles (Passalidae). Thís representa collections from oniy a small portion of the kno\A/n passaiids. The mites are distributed among 21 families and 68 genera. Six of these famiiies occur oniy in associatíon \A/Íth passaiids. The largest number of mítee associated \A/ith passaiids belong to the taxonomic group Mesostigmata, supercohort Trigynaspida. Species of t\A/o míte families live on the beetle in a parasitic orcommensal relatíonship. The remaining families have a phoretic associatíon \A/íth the beetles, using the beetles for transportation to new habítats. Specíes of nine of these mite families are not common on passaiids, and are probably opportunitíc phoretics on the beetle. Studies suggest that \A/hen oniy the female disperses these mites reproduce parthenogenetically, but \A/hen both sexes disperse mating takes place after díspersal. Various methods of holding onto the beetle have evolved among the different míte groups. Mites partition riding space on the beetle and reproductiva areas of the beetle tunnel, thus reducíng or elíminating competition. Data suggests that mite-beetle host specíficity is rarely a 1:1 relatíonship. Specificity is possibly beetle habitat relatad, e.g., beetles \A/hich live under the bark versus beetles v\/hich live deeper in the log. Mitas of 17 families have been coliected from Ne\A/ World passaiids. Taxonomic keys to these families and genera, characters for family recognition, tha number of species kno\A/n from passaiids, and comments on these specíes are ínciuded for mites from New World passatid beetles.
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