55 



Experiment 3. 



Lygus pratensis L. 



May 25, confined adults on young shoots of Gooseberry. 

 Result. — May 30, no effect perceptible. 



Experiment 4. 



Lygus pratensis L. 



Tried same experiment as No. 3, leaving adults on slioots for twenty 

 days. 

 Results. — Same as in the preceding. Insects all dead. 



Experiment 5. 



Lygus pratensis Jj. 



June 25, placed twelve adults on young shoots of Pear. 



Result.— July 10, both the insects and tliat portion of the shoot 

 upon which they were confiued were dead. The plant withered and 

 turned black, as in Exj)eriment No. 2, but in this case died. 



Experiment G. 



Lygus pratensis L. 



May 21, placed a number of larvie ou a Charles Downing strawberry 

 which was just turning to the white color which precedes the final red 

 or ripe color. 



Result. — May 28, berry fully ripe and uninjured. Not " buttoned." 

 Several larvae dead, and one advanced to pupa. 



Experiment 7. 



Lygus pratensis L. 



May 25, placed ten pupse on nearly full-grown Crescent strawberries. 

 Results. — May 31, berries no larger than when insects were placed on 

 them, but are withered and prematurely ripe. No indication of "but- 

 toning." Some of pupa3 dead; others now grown to adults, alive and 



active. 



Experiment 8. 



Lygus pratensis L. 



May 26, placed larva 1 on a half-grown Sharpless strawberry. 



Result. — June 7, berry not more than half as large as when insects 

 were placed upon it ; withered and black. Five <>f the larvae now pupa 1 , 

 and still alive. 



