Red 6 From 3.5 On charcoal Dissolves A deep Modified Oxide to 4 yields a without brownish crystals. globule of effer- red. copper. vescence Chryso- From 2 From 2 Infusible. Partly Bright Incrus- colla to 2.3 to 3 soluble bluish tations. green. Copper 5 From 2.5 Fumes of Copper Grayish Modified Glance to 3 sulphur and a soluble, Lead. rhombic globule of sulphur prisms. copper deposits Erube- 5 From 3 Fumes of Partly Yellowish Massive. scite to 3.5 sulphur and soluble red or magnetic tarnished. globule. Malachite is characterized by its color from Copper Glance and Red Oxide and Erubescite, and from Chrysocolla by the action of the acid, the fibrous structure and blowpipe reaction, gravity, and hardness. Red Oxide is distinguished from Erubescite, which it alone resembles, by its darker color, higher specific gravity, and yielding a globule of pure copper. Chrysocolla is characterized by its low specific gravity, light color, lack of fibrous structure, blowpipe reactions, and the acid. Copper Glance is distinguished by its color, fumes of sulphur, and globule of copper. Erubescite is distinguished from Red Oxide, which it alone resembles, by its lighter color, great solubility when pure, and yielding a magnetic globule before the blowpipe in the hollow of a piece of wood charcoal, which is used instead of platinum wire in this investigation. * * * * * ENTOMOLOGY. [Footnote: From the _American Naturalist_, November, 1882.] THE BUCKEYE LEAF STEM BORER.--In our account of the proceedings of the entomological sub-section of the A.A.A.S., at the 1881 meeting (see _American Naturalist_, 1881, p. 1009), we gave a short abstract of Mr. E.W. Claypole's paper on the above insect, accepting the determination of the species as _Sericoris instrutana_, and mentioning the fact that the work of _Proteoteras æsculana_ Riley upon maple and buckeye was very similar. A letter recently received from Mr. Claypole, prior to sending his article to press, and some specimens which be had kindly submitted to us, permit of some corrections and definite statements. We have a single specimen in our collection, bred from a larva found feeding, in 1873, on the blossoms of buckeye, and identical with Mr. Claypole's specimens, which are in too poor condition for description or positive determination. With this material and with Mr Claypole's observations and our own notes, the following facts are established: