纤恙螨属一新种(蜱螨亚纲,恙螨科)

A NEW SPECIES OF THE GENUS LEPTOTROMBIDIUM FROM NINGXIA,CHINA(ACARI,TROMBICULIDAE)

记述纤恙螨属Leptotrombidium Nagayo et al.,19161新种,拟六毛纤恙螨Leptotrombidium(L.)subsexsetum Ma,Baiet Feng,sp.nov.,模式标本采自宁夏回族自治区六盘山自然保护区洮州绒鼠Cargomgseva Thomas,1911体,保存于军事医学科学院微生物流行病研究所医学昆虫标本馆。

This paper reports a new species of the genus Leptotrombidium from Ningxia Hui Autonomous Region, China. All measurements are given in microns. The type spedmens are deposited in the Institute of Microbiology ＆ Epidemiology, the Academy of Military Medical Sciences, Beijing. Leptotrombidium （L.） subsexsetum Ma, Bai et Feng, sp. nov. （Figs. 1-4） Body white in color when alive. SIF = 7B-B-3-2111- 0000, fp = N-N-BNb. Scutum nearly flat-square shaped. Proximal sensillae smooth and having 13-15 slight branches on 2/3 distally. PW/SD = 1.85, PW/AP = 2.85, AM 〉 PL 〉 AL, SB/PLs. Eyes 2 ＋ 2, Oa ≈ Op. fst = 2.4. Dorsal setae 73-81 in number, Ventral setae 58-65 in number. NDV = 131-144. Coxal setae 1.1.1. Length of legs： Ⅰ = 341-388, Ⅱ = 321-342, Ⅲ = 388- 413, Ip = 1112. Holotype, larva collected off Eothenomys on 25 Oct. 2006, from Liupan Mountain （ 106°11＇N,35°46＇E, alt. 2 800 m）, Ningxia Hui Autonomous Region. The new species resembles L. （ L. ） sexsetum Yu et Hu, 1981, but can be separated from the latter by fp = N-N-BNb, PW/AP = 2.85, AW = 81.9, PW = 99.9. Proximal sensillae smooth and having 13-15 slight branches on 2/3 distally. Dorsal setae 73-81 in number.