本種の生態の詳細は不明だが、成虫は５～６月にスダジイやマテバシイ、テイカカズラの葉上にParabaliothrips、Scirtothrips、Trichromothripsが多数発生している時期に一緒に発生しており、おそらくこれらのアザミウマ幼虫などを捕食するものと思われる。本種は中国に分布するF. tangi Mirab-Balou et al.に似るが、触角第3節が幅の約8倍の長さ（後者では14.5倍）であることなどで識別できる。本種とは異なり、多くの種ではアリガタシマアザミウマF. vespiformisのように腹部がふくらみ基部が狭まる。

This species occurs on the tree leaves such as Castanopsis sieboldii, Lithocarpus edulis and Trachelospermum asiaticum together with several thripid species such as Parabaliothrips brevisetosus, Scirtothrips spp. and Trichromothrips elegans. It possibly preys on the larvae of those thrips but its biology is uncertain. This species is very similar to a Chinese species F. tangi Mirab-Balou et al., but it can be distinguished by the antennal segment III about 8 times as long as width (about 14.5 in tangi). Unlike tangi and this species, most species of this genus have the abdomen swollen with base distinctly narrowed as like F. vespiformis.

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  Female

  

  Female

  

  Female

  

  Female

  

  Female, head and thorax

  

  2nd instar larva?