Within the last few years three books have taken their place in the scientific literature of this country that should make a great advance in the study of natural history in our high schools. The first was “The Butterfly Book,” by Dr. W. J. Holland; the second, “The Insect Book,” by Dr. L. O. Howard, and the third, recently out, “The Moth Book,” by the author of the first. The cheapness of these three volumes places them within the means of any high school that makes any pretense to having a reference library, while the excellent plates, photographed from the specimens, make them of great value to the young who desire means for identifying their captives.