Symbiontic Interrelationships between Microbes and Ambrosia Beetles (Coleoptera: Scolytidae). V. Amino Acids as a Source of Nitrogen to the Fungi in the Beetle1

The nonprotein amino acids found in adult female Xyleborus ferrugieus (F.) were qualitatively similar to those found in most endopterygotes. Proline, valine, and alanine were the major constituents in the free amino acid pool. The soluble peptide and amide portion contained relatively large quantities of threonine and valine. Glycine was the most abundant amino acid in the protein residue.