Eight species of mites of family Tarsonemidae, four of which are new species, were described.<br>1. Tarsonemus fusarii COOREMAN, 1941 (Figs. 1-2)<br>This is the first record of T. fusarii from Japan (Kyushu). Some females collected from a withered grass were reared individually on decayed pear leaves to produce young. Offsprings were examined morphologically.<br>2. Tarsonemus pallidus BANKS, 1899 (Figs. 3-4)<br>This particular species was recorded for the first time in Japan (Honshu), as an injurious pest of cyclamen in greenhouse. Though BEER (1954) placed this species in genus Steneotarsonemus, SCHAARSCHMIDT (1959) returned it to genus Tarsonemus, according with the shape of its gnathosoma. The author agrees to the SCHA-ARSCHMIDT'S opinion.<br>3. Tarsonemus yoshidai ITO, 1962 (Figs. 5-6)<br>Characteristics of the females were described for the first time in this paper.<br>Body length including palpi 208, width at widest level 105. Anterior median apodeme distinct almost for its entire length. Transverse apodeme curved forward at both sides of jucture of anterior median apodeme with transverse apodeme. First ventral propodosomal seta situated just behind apodemes I. Second dorsal propodosomal seta about four times as long as the first. Sixth dorsal hysterosomal seta about four times as long as the fifth.<br>4. Tarsonemus sasai ITO, 1962 (Figs. 7-8)<br>The previous description of this species was based only on a male specimen. Recently, we found a number of the mite from Evodia-plants.<br>The female characteristics are described for the first time in this paper. Body oval, in life dark blue, 150 long, 93 wide. Propodosomal shield covering more than the posterior half of gnathosoma, but so variable the feature individually, may be by the mounting technique. Anterior median apodeme distinct only in its anterior half. Transverse apodeme simple. Second dorsal propodosomal seta about one and a half times as long as the first. Tibiotarsus I with a dorsal clavate, annulated sensal seta, situated at mid-length of the segment, with a group of three sensillae. Tarsus II with a clavate, annulated sensal seta and a spine, both situated dorsal near base of the segment. Each dorsal seta of femur II and genu II stout.<br>5. Tarsonemus evodiae, n. sp. (Figs. 9-11)<br>Male: Body oval, length from tip of palpi ot posterior end of genital papilla 150, width at widest level 85. Capitulum chestnut-like. Genital papilla subcoadate. Second dorsal propodosomal seta somewhat shorter than the first. Fourth dorsal propodosomals situated slightly behind and lateral from the third. Tarsus I with a dorsal, clavate, annulated sensal seta, about two thirds as long as the segment. Tarsus II with a dorsal long clavate, annulated sensal seta, and with a small spine, situated at behind midlength of the segment. Femur IV 30 long (measured outer margin), distal two thirds of inner margin somewhat expanded, distal third of inner margim creased; proximal seta 4 long; distal ventral seta 16 long; dorsal seta 6 long, situated apical sixth of the segment. Tibia IV 12 long, 6 wide, inner margin concave; dorsal rod-like seta 4 long, situated at the mid-segment; ventral seta about 33 long Claw IV strong, the distal end rounded.<br>Female: Body oval, 183 long, 115 wide. Capitulum broad, chestnut-like. Propodosomal shield projected, but so variable the feature individually. Anterior median apodeme ending near posterior extremities of apodemes II, with a small knob at mid-length of apodeme. Apodemes I indistinct. Transverse apodeme forming a smooth, shallow arc. Second dorsal propodosomal seta twice as long as first seta. Ventral caudal setae invisible. Apical segment of leg IV short.<br>Holotype: Male, on Evodia rutaecarpa, Y. ITO, Hachiohji City, Tokyo (Honshu), 25 Sept., 1962.<br>Paratypes: 5 males and 12 females, same data as holotype.<br>Remarks: T. evodiae is closely related to T. sasai