寄螨亚科6已知种补充描述（蜱螨亚纲：革螨股）

对短毛寄螨Parasitus brachychaetus Ma，1986；王氏寄螨Parasitus wangdunqingi Ma,1995；二刺寄螨Parasitus bispinatus Ma，1996；北方糙革螨Trachygamasus borealis Ma et Wang，1996；三尖常革螨Vulgarogamasus trifidus Ma,1987和甘肃常革螨Vulgarogamasus gansuensis Ma，1987进行了补充描述。

Supplemental Descriptions of Six Known Species of the Subfamily Parasitinae(Acari:Gamasina)

Three new species of the genus Zercon are described in the present paper. Type specimens are deposited in the Entomology Gallery, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China. 1 Zercon taishanensis sp. nov. （Fig. 1） Female. Length of idiosoma 462-505 （av. 486） μm, width 387-409 （av. 400） μm. Dorsal cavities 2 pairs, distinct and well sclerotized. Dorsal chaetotaxy complete. J6, Z4 and S2-S4 long and stout, rarely pilose at the end; S1 shorter and stout, rarely pilose at the end; i1, r2-r6 and R1-R7 shorter and thin, rarely pilose at the end, remaining setae very short, simple. Lengths of setae and distances between setae of single rows on posterior dorsal shield in μm are given in the formulae of dorsal setae 1. Pore Po3 lies inside of line connecting setae Z3 and Z4, near to Z4. Posterior margin of sternal shield slightly concave, with 3 pairs of setae. Metasternal setae on cuticle interior to endopodalia. Genital shield with 1 pair of setae. Adgenital shields 1 pair. Ventro-anal shield large, with 8 pairs of setae except perianal setae. Peritrematal shields broad, setae P1 short and simple, P2 long and rarely pilose, peritreme arc-shaped, reaching to level of anterior part of coxae Ⅲ. Tectum wing-shaped, medial projection bifurcate. Movable digit of chela tridentate, fixed digit pentadentate. Male. Length ofidiosoma 430 μm, width 323 μm. Dorsum as in female, Lengths of setae and distances between setae of single rows on posterior dorsal shield in μm are given in the formulae of dorsal setae 2. Sterno-genital shield with 5 pairs of setae, genital opening situated at level of coxae Ⅲ. Between sterno-genital and ventro-anal shields with a sclerite. Other structures as in female. The new species is similar to Zercon xiaoxinganlingensis Ma et Yin, 1999, but setae Z3 of the new species very short, dorsal setae rarely pilose; in the Z. xiaoxinganlingensis Z3 long and stout, dorsal setae densely pilose. The new species is also near to Zercon solenites Haarlov, 1942, but in the new species J6, Z4 and S1-S4 stout, pore Po3 situated antero-interior to Z4, in the Z. solenites J6, Z4 and S1-S4 thin, Po3 situated interior to Z4. Holotype ♀ , paratypes 5 ♀♀ and 1 ♂ , ex moss, from Taishan Mountain （36° 15′ N, 117° 06′ E）, Shandong Province, 18 July 2000. 2 Zercon kaszaboides sp. nov. （Fig. 2） Female. Length ofidiosoma 516 μm, width 376 μm. Dorsal cavities 2 pairs, distinct and well sclerotized. Dorsal chaetotaxy complete. J4-J6, Z3-Z4 and S2-S4 long and stout, rarely pilose at the end; S1 shorter and stout, rarely pilose at the end, il and r2-r6 shorter and thin, rarely pilose at the end; remaining setae very short, simple. Lengths of setae and distances between setae of single rows on posterior dorsal shield in μm are given in the formulae of dorsal setae 3. Pore Po3 lies inside of line connecting setae Z3 and Z4, near to Z4. Posterior margin of sternal shield slightly concave, with 3 pairs of setae. Metasternal setae on cuticle interior to endopodalia. Genital shield with 1 pair of setae. Adgenital shields 1 pair. Ventro-anal shield large, with 8 pairs of setae except perianal setae. Peritrematal shields broad, setae P 1 short and simple, P2 long and rarely pilose, Peritreme reaching to level of middle of coxae HI. Tectum wing-shaped, medial projection bifurcate. Movable digit of chela tridentate, fixed digit quadridentate. The new species very similar to Zercon kaszabi Blaszak, 1978, but in the new species dorsal setae J3 longer than J2, pore Po3 lies antero-interior to Z4; in the latter species J3 subequal to J2 in length, Po3 lies anterior to ZA. Holotype ♀, ex forest soil, from Lanzhou （36° 00′ N, 103° 48′ E）, Gansu Province, 18 June 2004. 3 Zercon longensis sp. nov. （Fig. 3） Male. Length of idiosoma 452 μm, width 312 μm. Dorsal cavities 2 pairs, distinct and well sclerotized. Dorsal chaetotaxy complete. J6, Z3-Z4 and S3-S4 long and stout, rarely pilose at the end; J4-J5 and S1-S2 shorter and stout, rarely pilose; i1 and r3-r6 shorter and thin, rarely pilose at the end; remaining setae very short, simple. Lengths of setae and distances between setae of single rows on posterior dorsal shield in μm are given in the formulae of dorsal setae 4. Pore Po3 lies inside of line connecting setae Z3 and ZA, near to Z4. Sterno-genital shield with 5 pairs of setae, genital opening situated at level of coxae III. Adgenital shields 1 pair. Ventro-anal shield large, with 7 pairs of setae except perianal setae. Peritrematal shields broad, setae P1 short and simple, P2 long and rarely pilose, peritreme reaching to level of middle of coxae HI. Tectum wing-shaped, medial projection bifurcate. Movable digit of chela tridentate, fixed digit quadridentate. The new species very similar to Zercon mongolicus Blaszak, 1978, but in the new species dorsal setae J4 slightly shorter than J5, end of J5 reaching not beyond posterior margin of posterior dorsal shield, Pore Po3 lies antero-interior to Z4; in the latter species J4 distinctly shorter than J5, end of J5 reaching beyond posterior margin of posterior dorsal shield, Po3 lies interior to Z4; Holotype ♂, ex forest soil, from Lanzhou （36° 00′ N, 103° 48′ E）, Gansu Province, 18 June 2004. The new species is named after collected locality, another name of Gansu Province.