Question regarding Helfer's Book "How To Know The Grasshoppers,..."
I have a copy of Helfer's "How to know the Grasshoppers, Cockroaches, and their Allies" C1953. I notice that there is a new edition out C1987. Does anyone know if there is any updating of the taxonomic data provided by this book between 1953 and 1987, or is the 1987 just a reprint of the original text? This is a great book, and would be even better if brought more up to date taxonomy wise. Thanks for any info.