Supplementary Report on Insects Affecting the Straivbemj. 241 



the case of the strawberry to interfere with the growth of the fruit, some- 

 times, at least, causing what is known as the " buttoning " of the berry. 

 Later in the season the buds and leaves of flowering plants and vegetables, 

 especially the cabbage and potato, are attacked. 



Fig. 2. The Tarnished Plant Bug {Lygus lincolaris, Beauv. 

 ameters. 



Adult, magiiifieil lifteen ili- 



There are at least two broods in a year, one maturing in May and June, 

 and the other in July and August, and it is possible that there is still another 

 intermediate. 



Although a very few of these insects are devoured by birds, no natural en- 

 emies are known to have any positive effect upon their numbers. There is 

 some evidence, however, tliat wet seasons are injurious to them. 



The general distribution of these plant bugs at all seasons of the year makes 

 it impossible to exterminate them or seriously to diminish their numl)ers by 

 artificial means, unless the clearing up and burning of rubbish late in autumn 



