On page 218 of the “Revised Manual,” in speaking of other sources than flowers from which bees collect sweets, I remark that I have seen the bees thick about a large bark-louse, which attacks and often destroys one of our best honey-trees. This is an undescribed species of the genus Lecanium.

In the summer of 1870, this louse, which, as far as I know, has never yet been described, and for which I propose the above very appropriate name, tulipiferæ–the Lecanium of the tulip tree–was very common on the tulip trees about the College lawns.