Abstract
The feces of young pine-worms (6_??_7 instar) were extracted with n-hexane, ethyl ether, chloroform, ethyl alcohol and water, and several kinds of compounds were isolated. They were mainly a poly ester, a fatty acid ester (palmitic acid ester), higher alcohols (octacosanol and ceryl alcohol), steroids (β-sitosterol and its ester) and a suger alcohol (D-mannitol). Various investigators have already isolated all of these compounds except D-mannitol and 1, 14-tetradecandiol from pine-needles. No studies have been made on pine-needles for the presence of D-mannitol and 1, 14-tetradecandiol. Therefore at present we cannot conclude whether or not D-mannitol and 1, 14-tetradecandiol are characteristic of the feces of pine-worms.
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