| abstract | The present paper deals with four new spedes of water mites, genus Hygrobates, and H. sinensis from China. All type spedmens are deposited in the Department of Plant Protection, Guizhou Agricultural College.
Hygrobates gousi sp.nov. (figs. 1-5)
Holotype ♂, allotype ♀, paratypes 2♂♂, 1♀, Oct. 10, 1988, collected by the author from the Huaxi River, Huaxi (26°4ʼ N, 106°6ʼ E), Guiyang, Guizhou Province.
This new species is similar to H. ampliatus Viets 1936 from Europe and North America, but differs obviously from the latter in the following characters: body length of both male and female are about 594; the second coxae contact with the third in anterior portion; the gland of the fourth coxa has two short glandularia.
The new species is named after the entomologist Professor Gou Zhen-zhong to acknowledge him for his help and support.
Hygrobates guizhouensis sp.nov. (figs. 6-11)
Holotype ♂, allotype ♀, paratypes 1♂, 2♀♀, May 12, 1988, collected by the author from Huaxi River, Huaxi (26°4ʼ N, 106°6ʼ E), Guiyang, Guizhou Province.
This new species can be easily separated from all of the known species of Hygrobates by the presence of three pairs of long setae on the individual acetabular plate in female.
Hygrobates atrovirens sp.nov. (figs. 12-16)
Holotype ♂, allotype ♀, May 12, 1988, paratypes 2♀♀, Oct. 10, 1988, collected by the author from the same river as above.
This new species is related to H. guizhouensis sp.nov., but they are extremly different from each other in body colour, the length of antenniform setae, the number of glandularia of the forth coxa.
Hygrobates xinyensis sp.nov. (figs. 17-20)
Holotpe ♂, paratypes 2♂♂, Feb. 4, 1990, collected by the author from a big stream of Xinyi City (25°1ʼ N, 104°8ʼ E), Guizhou Province. Female: unknown.
This new species is similar to H. procursus Viets 1936 from Europe and North America, but the distoventral projection on P-II is very well developed in the former and very slightly developed in the latter. The femaleʼs [sic - read maleʼs] posterior projection, with a seta on the fourth coxa and directed toward the central direction of body, but in the latter without seta and directed toward the post-direction of body. Their longest tickened distoventral setae are also very different in length, the former about 50, the latter only 31.
Hygrobates sinensis Uchida et Imamura 1951 (figs. 21-26)
Body length: male 510, female 573 (566-580); length between anterior end of capitulum and posterior end of genital field: male 425, female 495; width of capitulum: male 65, female 71; length of the anterior coxal group: male 190 and femeale 205.
Many other characters are also redescribed in this paper.
Materials examined: 15♂♂, 11♀♀, July 1, 1988, collected by the writer from the Grand Canal in Xibeiwang (40°6ʼ N, 116°2ʼ E), Beijing. |