JSTOR

Beamer, R.H. (1937). A review of the genus Osbornellus in the United States and Canada (Homoptera-Cicadellidae). Journal of the Kansas Entomological Society, 10(3): 89-112.

No little difficulty has been experienced in trying to sort out the various species, even with the aid of the internal male genitalia. We must have a thorough host plant study to be able to satisfactorily accomplish this task. The females, except in a very few instances are practically useless when it comes to characters of specific value. Color pattern of the dorsum, especially of the vertex, has been used wherever possible. The length and breadth of the vertex were also useful in separating some of the more complex groups. The characters of most value, however, are to be found in the internal male genitalia, especially in the lateral view of the aedeagus with its processes.