295 



In 1895 Osborn announced his views on the T^hylog-eny of the 

 Auchenorhynchi as follows: 



"The other division (i. e. Auchenorhynchi) beginning with 

 those forms which have the most generalized condition of wing 

 venation and body structure, would commence with the Cica- 

 didae and follow the ascending order which is given in the cur- 

 rent systems. It is true that the Cicadidae are themselves a 

 specialized grchui), particularly in the forms possessing musical 

 organs, but in their approach to the I'syllidae in wing venation 

 and structure of the h.ead and thorax they seem on the whole to 

 present more generalized characters than can be found in any 

 of the other families of the Homoptera. 



"The Membracidae., except in extremely specialized pronotum, 

 are easily seen to be related to the Cicadidae and naturally take 

 their position next to them. The Fulgoridae, while possessing 

 specializations of the head, are in thoracic structure and vena- 

 tion more generalized than the remaining families, and while 

 possessing many highly differentiated sub-groups, may very 

 probably be interposed between the preceding families and the 

 Jassoid division. The Cercopidae in development of scutellum 

 and in texture of elytra, as well as in the specialization of the 

 tibiae, sht:»w characters of rather high rank, and, if placed as 

 subordinate to the Jassoidea, they must at least be considered as 

 a branch of nearly ecpial or ])arallel rank. The Jassoidea, 

 se[)arable into Bythoscopidae and Jassidae ])r()per, may, on the 

 whole, be considered as the most highly organized of the series, 

 and as somewhat e(|uivalent branches, the Bythoscopidae being 

 in some respects extremely s])ecialized, while the Jassidae are 

 subdivided into nearly e(|ual branches, Jassinae and Tettigoni- 

 nae." 



(b) SYSTEM ADOPTED. 



The following is the classitication I adopt here for the Auclie- 

 norh}nchi, showing also their position with regard to other He- 

 miptera, proceeding from the more primitive to the more spe- 

 cialized. 



Group \—AVCHENORHyNCHl Amyot & Serville. 



Super-family \—CICADOlDtA. 



Family I -CICADIDAE. 



Super-family 2— 77i TIGONIOIDEA . 



Family J -TETIGONIIDAE (=super-family Jassoidea, Van Duzee.) 



