Larvae of Apochima excavata (Dyar) were observed in the field using the same methods as Funakoshi and Miyano (2010) and were reared in the laboratory in 2010. Additional notes on the ecology, in particular the behavior of the imagines, place of pupation, sex ratio, number of eggs laid and ovipositing position, were investigated to examine the unique adaptation to the habitat and host plant of the species.