本種はおそらく食肉性で、他のアザミウマなどの小昆虫を捕食するものと思われる。各種の花にも見られるが、どちらかといえば草地のススキ等のイネ科植物上に多く見られる。小笠原諸島を除く日本に広く分布し、海外では台湾の山地帯や中国からも知られる。どちらかというと北方系の本種が亜熱帯の琉球列島に生息することは注目に値する。シマアザミウマA. fasciatusによく似るが、前翅の２黒帯が後方でつながることで区別は容易。

Probably this species preys on other small insects such as thrips. It is often observed on the flowers of various plant species but more commonly found on grasses such as Miscanthus sinensis. It is widespread in Japan excepting the Ogasawara Islands, and also distributed China and the mountainous area of Taiwan. It is interesting that this species is distributed in the northern areas rather than southern areas but is known from subtropical Ryukyus. It is very similar to A. fasciatus (Linnaeus) but it can easily be distinguished from the latter by two dark bands on the fore wing narrowly connecting at posterior margin.

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  Female

  

  Female

  

  Female

  

  Female

  

  Female, head and thorax