LAWSON : KANSAS CICADELLID.^. 21 



ing down saw a little green leaf hopper at work. It was se- 

 cured and proved to be the species mentioned. 



The matter of such biting brings up an interesting question, 

 for so few of the Homoptera have ever been known to be guilty 

 of such conduct. In fact, outside of the occasional piercing of 

 Cicadas, the writer does not know of any other members of this 

 order that have been recorded as attacking man. Whether 

 they merely prick the skin because it is their nature to be pierc- 

 ing something or whether they are really fond of an occasional 

 meal of blood would be an interesting question for determina- 

 tion. 



From the foregoing discussion of the economic importance 



of the group it will be seen that it is necessaiy to know which 



are injurious species and which are not. Hence the value of a 



systematic study of the group and an acquaintance with its 



forms, so as to be able to single out those of economic impor- 

 tance. 



