Neotropical Homoptera of the Carnegie Museum. Part 5. Report upon the Collections in the Subfamily Cicadellinae with descriptions of new species

The Cicadellince. include an immense number of species, many of them strikingly beautiful in color or peculiar in shape, having bizarre forms. While a very fascinating group, they evidently have been the despair of systematists on account of the great multiplicity of species and uncertain relationships. No dependable characters have been found for the separation of genera and the distinction of species, but in many cases the genitalia appear to offer quite reliable characters, especially for the separation of species.