Caeculisoma penlineatus Xu Jin sp. nov. is described and illustrated based on larvae ectoparasitic on Hemiptera from Chongqing Municipality, Guizhou Province and Hainan Province, China. A modified generic diagnosis of larval Caeculisoma is also provided.
Keywords: Acari, Acariformes, Erythraeoidea, Hemiptera, Oriental Realm, Sino-Japanese Realm, Trombidiformes.