English: Notes on the behavior of unengorged larvae of Trombicula akamushi , especially on the mechanism of their cluster formation and their reaction to expired CO_2 gas
Japanese: つゝが虫の研究第 86 アカツゝガムシ未吸着幼虫の生態に関する新知見特にその集落形成機構と呼気炭酸ガスによる興奮現象について