Abstract: In order to investigate the area distribution and host selection of Leptotrombidium scutellare in Yunnan Province，a field survey was carried out during 2001 to 2009，based on different geographic location，topography，climate and ecological characteristics. A total of 16 491 L. scutellare were captured from the body surface of 9 838 small mammal hosts of 7 families，18 genera，and 30 species in 4 orders，accounted for 17.73%（16 491/92 990） of all chigger mites collected. L. scutellare distributed in 12 counties，more in the northwest and south of the Province. Although L. scutellare could parasitize on different small mammal species，most of them were on Eothenomys miletus and Apodemus chevrieri.

Key words:  , Leptotrombidium scutellare；Distribution；Host selection；Yunnan Province