(after Fletcher 2009): Fulgorids usually have a process on the front of the head, although in most species this process forms no more than a small knob pressed down onto the vertex. In some forms, however, the process is large and obvious.
Fletcher MJ
(2009):
Identification keys and checklists for the leafhoppers, planthoppers and their relatives occurring in Australia and neighbouring areas (Hemiptera: Auchenorrhyncha). WEB