DR. MORRIS: In Dr. Brooks' paper he spoke of some of the twig girdlers in the beetle stage which feed upon the bark of twigs before ovipositing, and he said that gives a weak point where we may attack them. On my place at Stamford, where there are forests, that would be impossible. I have had a good many hazels partially destroyed this year by girdlers. A great many of the branches have the larvae in them. I find also a large number of small hazels on which the leaves and branches are dying, though there is no apparent injury to the bark. Suddenly, however, a little twig will drop off and yet, in cutting into them, I did not find any larvae. DR. BROOKS: That happens to be the work of an insect which I am just beginning to study, one of the flat-headed borers, and the reason you have not seen the larva is that it is very small. It is not half an inch long. In the second year it comes out as an adult. I judge that control measures should be used in the spring, when I think without doubt that it would feed on the poisoned spray. DR. MORRIS: I find a great many larvae in dead twigs on the ground. If we are going to get this pest out of the way, we should not only look at the twigs on the tree, but at those on the ground as well. DR. BROOKS: That is true of all of these curculios. Dr. Morris' statement is true. The ground should be gone over and the dead and dying branches and twigs of the trees should be collected. The insects mature in them. DR. COLLINS: Would you advocate pruning often? DR. BROOKS: No. Adjournment to lecture hall. Mr. Henry Hicks of Westbury, Long Island, gave a talk on the transplanting of large trees by his methods, illustrated with lantern slides. This was followed by a talk with lantern slides, on HEREDITY IN TREES AND PLANTS _By Dr. A. F. Blakeslee, New York_ Dr. Blakeslee said in part: One of the first things we notice as we go out into the open is diversity in the habits of trees and plants. It is through the details thus presented that we are able to distinguish one species from another. You can see this diversity the year round in nut trees, and in the nuts. If you arrange nuts, or any other objects for that matter, in a curve according to size, you will find that the most numerous of them are of about the average size. This is equally true when applied to mankind. What is the reason? There are a number of factors affecting this, but, in general, there are two main causes--environment and heredity. We do not know which is the more important but both are absolutely necessary. In the picture being shown we see the influence of the black walnut upon plants around it. It creates an environment which influences the ability of other plants to grow near the roots.