20 



THE FUNGI WHICH CAUSE PLANT DISEASE 



The genus according to the system of Migula is given its proper ab- 

 breviation which precedes the number thus: * 



Bacillus con (Esch.) Mig. 

 Bacillus alcaugenbs Petr. 

 PsEUDOMONAS CAMPESTRis (Pam.) E. F. Sm. 

 Bacterium suicida Mig. 



* Incomplete group numbers are given with many of the species in suc- 

 ceeding pages. In these the known factors are given and the unknown or 

 imperfectly known are represented by dashes. These numbers were worked 

 out for the author by Mr. W. C. Norton, from the available literature. 



