【摘要】 <正> 本文记述我们于云南采到的纤恙螨属(Leptotrombidium Nagayo et al.,1916)五新种。全部模式标本均保存于云南省流行病防治研究所。中甸纤恙螨Leptotrombidium(Leptotrombidium)zhongdianense Yu et Yang, 新种(图1—5)更多还原

【Abstract】 This paper reports five new species of Leptotrombidium from Yunnan Province. The type specimens are deposited in the Control and Research Institute of EpidemicDiseases of Yunnan Province. Leptotrombidium (Leptotrombidium) zhongdianense Yu et Yang, sp. nov.(figs. 1--5) Idiosoma of engorged larva 561×473μ. Galeal seta plumose. Palpal formula N-N-BNN + 7B. Scutum broadly rectangular, posterior margin markedly biconvex. Sen-sillae filamentous, with 14--17 long branches on distal 2/3, proximal 1/3 with minutebarbs. PLs/SB. AM>PL>AL. Dorsal setae 29--33 in number, irregularly arrang-ed, In holotype roughly: 2-8-6-6-6-4 = 32. Sternal setae 2-2. Ventral setae 35--44 innumber. Legs with specialized setae as figured. Standard measurements: AW = 75,PW=92, SB = 39, ASB = 26, PSB = 17, AP = 23, AM = 64, AL = 45, PL = 60,Sn = 77, HS = 63, DS = 53/44, VS = 37/46, IP = 771. Holotype and 5 paratypes, larvae, ex Apodemus agrarius chevrieri, from Yunnan,March, 1965. 4 more paratypes, larvae, ex A. latronum. Close to L. (L.) daisen and L. (L.) intermedium, but scutum broader than long,ratio of PW to SD about 2.14: 1, AM>PL>AL. Further, L. (L.) daisen: sensillaeproximal 1/4 nud, L. (L.) intermedium: SB/PLs. Leptotrombidium (Leptotrombidium) deplanoscutum Yu et Zi, sp. nov.(figs. 6--10) Idiosoma of engorged larva 504×428μ. Galeal seta plumose. Palpal formula N-N-BNN + 7B. Scutum broadly rectangular, with posterior margin almost straight.Sensillae filamentous, with about 14 long branches on distal 2/3, proximal 1/3 withminute barbs. SB/PLs. PL>AM>AL. Dorsal setae 33--34 in number, arranged2-8-6-6-6-4-2(1). Sternal setae 2-2. Ventral setae 35--40 in number. Legs with spe-cialized. setae as figured. Standard measurements of holotype (and paratype):AW = 81(81), PW = 96(98), SB = 40(41), ASB = 25(26), PSB=16(15), AP=28 (27),AM = 62(64), AL = 42(42), PL = 67 (67), Sn=83(-), HS=62(61), DS=53/43 (58/40),VS = 30/43 (30/42), IP = 765 (745). Holotype and 1 paratype, larvae, ex Rattus flavipectus, from Yunnan, August,1961. Close to L. (L.) zhongdianense, sp. nov., but different in shape and measurementsof scutum, SB/PLs, PL>AM>AL, tarsala Ⅰ>Ⅱ. Leptotrombidium (Leptotrombidium) xiaguanense Yu et Yang, sp. nov.(figs. 11--14) Idiosoma of partly engorged larvae 308--391×238--284μ. Galeal seta plumose.Palpal formula N-N-BNN + 7B. Scutum broadly rectangular, with markedly biconvexposterior margin. Sensillae filamentous, with 15--17 long branches on distal 2/3,proximal 1/3 with minute barbs. SB-PLs. AM>PL>AL. Dorsal setae 28 in number,arranged 2-8-6-6-4-2. Sternal setae 2-2. Ventral setae 32--36 in number. Legs withspecialized setae as figured. Standard measurements: AW = 75, PW = 88, SB = 38,ASB = 31, PSB = 20, AP = 28, AN = 59, AL = 49, PL = 53, Sn = 76, HS = 56,DS = 46/53, VS = 31/51, IP = 845. Holotype: larva, ex Apodemus agrarius chevrieri, from Yunnan, Nov., 1960. Paratypes: 7 larvae, collected from the same animal host of the holotype, on Nov., 1960 and Dec., 1975. Close to L. (L.) zhongdianense, sp. nov., but different in shape and measurementsof scutum, Tarsala Ⅰ<Ⅱ. Leptotrombidium (Leptotrombidium) sexsetum Yu et Hu, sp. nov.(figs. 15--18) Idiosoma of engorged larva 730×561μ. Galeal seta plumose. Palpal formula N-N-NNN + 7B. shape of scutum as indicated in the figure. Sensillae filamentous, withminute barbs on proximal 1/3, distal 2/3 with 18--19 long branches. SB slightly an-terior to line of PLs. AM>PL>AL. Dorsal setae 62--69 in number, irreguarly ar-ranged, in holotype arranged 2-19-12-2-10-2-9-4-2 = 62. Sternal setae 3 pairs. Ventralsetae 57--62 in number. Legs with specialized setae as figured. Standard measurements(holotype): AW = 78, PW = 93, SB = 35, ASB = 37, PSB = 18, AP = 38, AM = 65,AL=52, PL = 55, Sn = 99, HS =64, DS = 53/50, VS = 35/43, IP = 1062. Holotype and 2 paratypes, larvae, ex Rattus coxingi andersoni, from Cangshan,Dali, March, 1978. This new species is readily separable from its congeners by the sternal setae in 3pairs, palpal formula N-N-NNN, dorsal setae 62--69 in number, IP>1000. Leptotrombidium (Leptotrombidium)更多还原