Abstract
To clarify the environmental factors such as landform and size of forest that affect the presence of larvae of Pyrocoelia fumosa, we recorded the distribution of larvae in suburban area openspace forest. In the result, we found larvae at 6 forest out of 29. There were Yato landform at all forests that the larvae were found. About the relationship between presence of larvae and size of forest, the size of forest that the larvae were found are about 8.7ha or more, and the result from logistic analysis it was shown that adequate forest size that is suitable for the larvae. It was suggested that to conserve Pyrocoelia fumosa Yato landform and constant size of forest is important.
