한국산 둥글장수풍뎅이(Pentodon quadridens bidentulus)의 3령 유충과 번데기의 형태를 처음 기술한다. 서식지와 실험실 사육에서 둥글장수 풍뎅이의 생태, 분포, 생활사 또한 제공한다.

Imago"s flight activities of Protaetia brevitarsis were from mid June to early September, and those of Allomyrina dichotoma were from mid June to late August. These activities were mainly influenced by amount and duration of rain. They were more active when there was small amount and short period of rain in a year. Distribution depth of the 3<SUP>rd</SUP> larvae of P. brevitarsis were not affected to the temperature. But A. dichotoma were sensitively react to the temperature, almost larvae were near the surface when high temperature. The distribution of P. brevitarsis was not affected by humidity, but most of A. dichotoma were near the surface when high humidity. Larvae of P. brevitarsis usually ate their dead individuals. When we supplied as food the pork, chicken, fresh mackerel, bread, apple, and pear. They took all of these food but larvae of A. dichotoma took only bread. Two species were lived in similar environment but those feeding habit was very different.