Of all the biotic relationships existing in the dune area the most intriguing are those between insect and mite pests of plants and their predators. After many months of careful observations the writer has prepared a preliminary report of the activities of some of the mites encountered on the dunes. Two substantial species of predators are here redescribed as well as diagrammed for sake of continuity, in addition to one very well known species. One species new to science is herein described and diagrammed. All diagrams were completed by the writer with the aid of an Abbe Zeiss camera lucida on a compound microscope, measurements of specimens being ascertained with a substage micrometer.