Studies of Teratological Phenomena. 



71 



to use it or by an actual increase, perhaps by fungi and bacteria, and 

 other unkown factors. 



Insects. Knox (1908) has shown the moth Mompha to be the cause 

 of fasciation in several Oenothera species (Fig. 7). Injuries were inflicted 



Fig. 7. Fasciated plant of Oenothera parvißora. (After Knox in Carneg. Publ.) 



