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Kraemer [1900], who investigated the galls formed by Cynips aciculata on Quercus cocinea, found that during the chrysalis stage gallic acid was produced and that as the imago developed the gallic acid gave place to tannic acid. These observations gain in interest if viewed in the light of the recent investigations of v. Stockert and Zellner [1914], who have proved the presence of nitrogenous products in a number of galls caused both by insects and fungi1, and also of the results of Nierenstein [1914] who has isolated galloylleucine CH3\ /COOH CH-CH2-CH

The Formation of Ellagic Acid from Galloyl-Glycine by Penicillium