【摘要】 <正> 1962年5—6月间,我们在吉林省的草原鼢鼠(Myospalax aspalax Pallas)和东北鼢鼠(Myospalax psilurus Milne-Edwards)的体上及其巢穴中采到了大量螨类标本。经整理后发现有三个新种,现分别记述如下。更多还原

【Abstract】 Ctenoglyphus myospalacis, sp. nov. Female （Figs. 1, 2）: Body 380μ long and 230μ wide. All peripheral setae bi-pectinate, with 5--12 barbs on each side of shaft. These barbs either smooth or having1--2 branches toward the tip of the setae. The v.e. located in front of v.i. comparativelyshort and broad. d₃ being the longest of the dorsal setae, about twice as long as Sc. End of the sensory rods of the tarsus Ⅰ and Ⅱ slightly enlarged. Tibia Ⅰ and Ⅱwith one simple seta, which is longer than the tarsus. Male （Figs. 3, 4）: Body 270μ long and 210μ wide. Chaetotaxy similar to thatof the female, but the peripheral setae somewhat medial, without brances on the barbs. Legs resembling those of the female, but the first 2 pairs comparatively stronger. Holotype （?）, allotype （?） and paratypes （10 ? ?, 10 ? ?） were collected inMay-June, 1962 from the nests of Myospalax aspalax （Pallas） in Kirin Province. Hirstionyssus pontiger, sp. nov. Female （Fig. 5）: Body oval, 900-1040μ long （gnathosoma not included） and500--550μ wide. Dorsal plate oval, with a rounded tip and 26 pairs of dorsal setae. Sternal plate rectangular. The anterior and lateral portion of this plate hihgly chi-tinized, giving a bridge-like appearance, hence the name. End of genitoventral platebluntly pointed, twice as long as wide. Coxal spurs: 0-1-2-0. Male （Fig. 6）: Body length 650-1030μ, elliptical. Dorsal plate oval, with broadly rounded end. Chaetotaxy as in female. Holoventral plate undivided, slightly narrowed between coxa Ⅳ and slightly expand-ed just behind the last coxae. There are 8 paired and 1 unpairec. setae on this plate.Uncovered ventral body surface with about 30 pairs of setae. Legs very strong. Tarsus Ⅲ and Ⅳ with 2 pairs of modified setae, the distalhalves of these setae abruptly thinned and screwed. Coxal spurs: 0-1-2-1. Holotype （?）, allotype （?） and paratypes （12 ? ?, 10 ? ?） were collectedin May-June, 1962 from the body and nest of the Myospalax aspalax （Pallas） in KirinProvince. This new species is allied to Hirstionyssus myospalacis Zemskaja et Piontkovskaja,1957, but is distinguished from the latter by the following characters: （1） The charac-teristic sternal plate; （2） posterior end of the dorsal plate bluntly rounded in both sexes;（3） genito-ventral plate with a tapering end; （4） holoventral plate only slightly widenedbehind the last coxae; （5） uncovered ventral surface of the male with about 32 pairs ofsetae. Hirstionyssus ventricosus, sp. nov. Female （Figs. 7, 10）: Large mites, 1650--2150μ long （gnathosoma not included）and 900--1350μ wide, venter in most case large, thus the name. Dorsal plate small, greater part of posterior and lateral dorsal surface uncovered,from S_7-8 abruptly narrowed to form a tail. Sternal plate rectangular, twice as wide aslong, anterior margin slightly concave, posterior margin convex. Genitoventral platesmall, tongue-like, Anal plate widely separated from the genitoventral plate. Legs exceedingly strong. Leg Ⅱ stoutest and shortest. Dorsal side of Femur Ⅰ andⅡ with a pair of long smooth setae. One such seta arises from the genu Ⅰ and Ⅱ aswell, but slightly shorter. Tarsus Ⅱ with 3 stout setae in the middle. Tarsus Ⅲ andⅣ with 5 stout setae ventrally. Coxal spurs: 0-1-2-0. Male （Figs. 8, 9, 11）: Body oval, 1300-1450μ long by 800-950μ wide. Dorsal plate covering almost entire dorsum, with 26 pairs of setae. Holoventral plate undivided, not enlarged behind the last coxae but narrowingthereafter progressively to a neck connecting with the anal part. There are 9 paired and1 unpaired setae on this plate. Legs Ⅰ and Ⅱ as in the female. There are 2 pairs of modified setae arising fromtarsus Ⅲ and Ⅳ subapically. These modified setae are screwed in their distal halves.Coxal spurs: 0-1-2-1. Deutonymph （Fig. 12）: Body oval, 1100--1200μ long and 650-750μ wide. Dorsal plate covering almost entire dorsum. Sternal plate fused with genitoventralplate, anterior margin straight, anterior angle truncate, the width of plate decreasing to-wards the tapering posterior end. There are 3 pairs of simple s更多还原