Abstract
In reply to the questions raised by the Rev. Thomas W. Fyles on p. 84 of the May number, permit me to say:1. That to speak of “the parasite of Phylloxera vastatrix and the gall insect of the nettle tree,” as he does in the heading to his communication, is inaccurate, since there are many of each.2. Besides a number of Cecidomyid galls on Celtis, I am acquainted with more than a dozen Psyllid galls upon the plant. The insects producing these galls mostly belong to a new genus which, in a paper that I have prepared on the Psyllidæ of the U.S., is called Pachypsylla.
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