When I saw Professor Vernon L. Kellogg's new “American Insects” advertised, I determined to posses a copy, which I thought would very naturally give a little more space than “Comstock's Manual” to the Heteroptera, and being a much more recent publication, would be free, with regard to the Waterbugs, from the mistatements and errors of fact of its predecessors and therefore serviceable as a book of reference. Very fortunately (from my point of view), a friendly bookseller allowed me to examine the volume and in consequence I was able to spare myself a useless expense.