The many difficulties encountered by those entomologists who have neither time nor access to scientific libraries, but who wish to be more than mere collectors, have induced me to try and assist them, more especially those who are to some extent advanced enough to distinguish many of the families and genera of the Coleoptera. I also hope to be of some assistance to those beginners who have a true love of nature and her works. Yet were I to write for this class only, the Entomologist would be more than full for years.