206 
of Fulgoroidea, viz., Flatidae,t~ Acanaloniidae,t Ricaniidae,” 
Tropiduchidae,? Dictyopharidae,* Issidae,* and Lophopidae.* By 
so doing he has placed all Homopterists under obligation. 
Workers may wish at times that he had been more critical in 
his treatment of some groups and had used more fundamental 
characters for his subfamilies and tribes, but this in no way 
detracts from our obligations to him for his great industry. 
Kirkaldy died before he had matured his views. Had he lived 
I feel sure he would have eventually produced a classification 
worthy of his labors. 
Many workers have added to the number of genera and spe- 
cies during the last decade, but in most cases their contributions 
to the broader aspects of classification of the fulgorids have not 
been great, and in some cases their work has been inimical 
through their having placed many genera into wrong families. 
The present paper is but an incomplete resumé of what is at 
present known on the subject of the families of the fulgorids. 
If it enables younger workers to recognize them, work upon 
their better characterization and to arrange more adequately the 
genera which compose them, then it will have served its pur- 
pose. I also hope that it will convince workers that the divi- 
sions are distinct enough to be recognized as families. This 
latter has a practical as well as a theoretical bearing, for 
workers are often more careful to place their genera into the 
right family than they are to place them into the right sub- 
family. It would also have the advantage of enabling the 
Recorder to segregate the genera into families in the “Zoologi- 
cal Record” instead of lumping them all together. 
I have also used some of the information that I have accumu- 
lated on the male genitalia. The characters found in these 
organs are without doubt the most valuable aids to specific 
work. Not only do they show the specific differences, but they 

1 Ann. des K. K. natur Hofmus Vienna (1902). 
2. (ec. XH i898): 
3 Verh. Natur. Verin. Brun (1914). 
4 Abh. K. K. zool. bot. Ges. Wien VII (1912). 
D ire 5 (CUIBN)), 
6 Ann. Mus. Nat. Hist. Hung. XIII (1915). 
