A Serological Study of Some Orthoptera

Many different classifications have been devised relating insects, chiefly on the basis of their morphology. In their broader outlines these classifications show general agreement. When the systematic relations- of orders to each other, and the relations of different genera within an order are in question, almost as many arrangements can be found as there are authors on the subject. Whenever there is an uncertainty in the relations of these groups, a classification showng these of necessity express the views of the individual who devised it. Some taxonomists (Blatchley 1920) have expressed the opinion that one order could follow another in almost any sequence without serious loss to the expression of their systematic relationships. Fernald (1921), however, cited the need for a reliable, objective method in determining insect relationships.