[This paper, an excellent addition to an excellent American paper by Mr. W. Trelease (Psyche, vol. iv., p. 195), is published in the Jrmischia, vol. v., No. 1, p. 4, 1885. As it will be difficult for American students to have access to this periodicar, I have translated the substance. Dr. Thomas has seen only the record of Mr. Trelease's paper in Botan. Centralblatt, xx., p. 356, by Dr. Ludwig.—H. A. Hagen.]

Larvæ of Cecidomyia living in the spore-layers of Uredineæ are also found in Thuringia, Germany. In fact the discovery of the community in the same layer of two otherwise very different parasites is at first somewhat wonderful and startling.