290 



bb. Clavus strewn with granules, apex sometimes subacute and 

 closed, sometimes very o'btuse and widely open, the two 

 veins separated throughout their entire length or united 

 near the apex; costa dilated, costal membrane transversely 

 veined; claval suture distinct flatida Stal. 



B. Posterior tibiae with a mobile spur at the apex 



Delphacld.i Stal. 



The Cercopidae are divided by him as follows: 



I. Anterior margin of pronotum straight; eyes equally long 

 and wide Ccrcopida Stal. 



II. Anterior margin of pronotum rounded or angled; eyes 

 most often transverse. 



A. Scutellum flat, triangular ApJiropJwrida Stal. 



15. Scutellum strongly elevated, compressed posteriorly, arm- 

 ed witli a long apical spine Macliacrotida Stal. 



The Tetigoniidae were studied oidv ver\- superficially by 

 Stal. 



In 1875 was commenced the posthumous publication of Fie- 

 ber's "Cicadines d'Europe." In an analytical table he divided 

 the European Auclienorhynchi into 8 families, Membracida, 

 Cicadaea, Fulgorida, Cercopida, Ulopida, Paropida, Scarida and 

 Jassida, the last four being part of the Jassida of other authors. 



In t888 Ashmead divided the Auchenorhynchi into 6 fami- 

 lies: Cicadidae, Fulgoridae, Membracidae, Cercopidae, Byt'ho- 

 scopidae and Jassidae, and the next year separated the Fulgo- 

 ridae into 6 suibfamilies, Acanoniinae, Flatinae, Ricaniinae, Issi- 

 nae, Caloscelinae, Dictiopharinae, the Cixiinae being further dis- 

 cerpted into Achilini, Tropiduchini. Derbini and Cixiini. This 

 work was little more than a misleading adaptation of Stal, and 

 was disfigured by many misprints in the rendering of previous 

 generic names. 



In 1890 appeared the most important work yet published on 

 the classification of Homoptera; this was, however, presented 

 in Danish and remained sealed to many workers till translated 

 into Englis'h by the present writer (1903). Hansen founds his 

 divisions on the characters especially of the antennae and legs, 

 and recognizes four families, 'Stridulantia, Cercopidae, Jassidae 

 (including Membracidae) and Fulgoridae. Hansen's table of 

 families is now reproduced, from my translation, in its entirety 

 and will be referred to in the course of this paper. 



A. Second segment of peduncle of the antennae without 

 sensory organs, flagelluni with several or many foveae. In- 

 termediate coxae with the intro-basal angles a little remote in 



