38o 



The following synonymy will elucidate this: 

 Genus t. Cercopis Fabricius 1775, Latreille, etc. 

 =Aphrophom Germar, 18 18. 



type Cicada spumaria Linn.. Latr., ■=zCicada alni Fallen. 

 Genus 2. Philacmis Stal 1864. 



—Cercopis Kirkaldy 1901. 



type Cicada Icucophthalma, Linn., =spumaria graininis 

 DeGeer, =spnmaria of most later authors. 

 It may be noted here that authors refer constantly to Aphrop- 

 hora salicis DeiGeer. There is no sudh species; DeGeer describ- 

 ed a form as Cicada spumaria salicis, an inadmissible term, and 

 the 'species s'hould be known as Cercopis rustica Fabricius. 



There are 3 conventional subfamilies as follows: 

 (i). Rhinaulacinae (=:;Cercopinae of some authors) wuth about 



25 genera. 

 (2). Cercopinae (=AiiJ'hrophorinae of some authors) with 



about 36 genera, and 

 (3). Machaerotinae, with 2 genera. 



(Of Embokmia Provancher 1889, I have not seen the descrip- 

 tion and it is not mentioned by Goding or Ball.) These sub- 

 families are separable as follows: 



1. Anterior mar'gin of pronotum straight Rhinaulacinae. 



la. Anterior margin of pronotum rounded or angulate 2. 



2. Scutellum flat, triangular Cercopinae. 



2a. Scutellum strongly elevated, armed witb a long apical spine. 



Machacroline. 



But as noted above, this is a classification of convenience. 



Subfam. Rhinaulacinae. 

 Euryaulax, gen. no v. 



General appearance of Phyniatostetha Stal. Vertex declivous, 

 flat, longitudinally sulcate exterior to t'he ocelli, the sulci bemg 

 parallel and the space between be'ng about equal to that be- 

 tween a sulcus and the nearest eye; the middle lobe is divided 

 by a transverse sulcus into two parts, the anterior being about 

 half the length of the posterior (*). 



The vertex i's also narrowly, transverselv impressed close to 

 the posterior margin. The entire anterior (dorsal) margin of the 

 head is strongly, acutely, carinate. The frons is pitted at its base 

 and is strongly swollen, transversely striate, somewhat deep- 



*It is possible that this middle lobe of the vertex is really a dorsal part of the frons. 



