102 SOAR: WATER MITES OF EPPING FOREST. Genus 10—FRONTIPODA, KOEN. F. musculus, Mull. Chingford and Upper Goldings Hill; taken several times at each place. GENUS 11—OXUS, KRAM. O. strigatus. Mull. Upper Goldings Hill, 1905. Sub-Fam.—LIMNESIINAE. Genus 12—LIMNESIA, KOCH. L. fulgida, Koch. Common all parts of the Forest. L. koenikei, Pier. Wanstead, 1900. Baldwins Pond, 1906. L. undulata. Ponds south of Epping station, Chingford, and East London Waterworks. L. maculata, Mull. East London Waterworks, 1908. Sub-Fam.—ATACINAE. Genus 13—UNIONICOLA, HALD. U. crassipes, Mull. Highams Park, 1900. Snaresbrook, 1895. U. ypsilophorus, Bonz. Parasitic in fresh water mussel. Highams Park, 1898- 1902. U. aculeatus, Koen. Highams Park, 1898. This mite I described in the Journal of the Quekett Microscopical Club as Atax taverneri, Soar, but it was found afterwards that Koen had priority with aculeatus. U. figuralis, Koch. Highams Park, 1900. Genus 14—NEUMANIA, LEB. N. vernalis, Koch. Epping, 1904. N. spinipes, Mull. Snaresbrook and Baldwin ponds. Several collections.