58 



Result. — June 21, being ripened in perfect condition, so far as form 

 and freshness are concerned. Was a very little smaller than Xo. 20. 

 Insects all dead, except one, which was in last larval stage. 



Note. — During June, 1885, three larvae, to all appearances of the 

 same species as the preceding, took up their abode on a full-grown 

 Crescent and remained there, voluntarily, until the latter was fully 

 ripe, the young bugs being observed to feed upon the juices. No in- 

 jury to the berry was in any way apparent. 



Experiment 22, 



Calocoris rapidus Say. 



June 8, confined four adults on as many heads of Fall Wheat, placing 

 two insects together upon each two heads of grain, and covering as with 

 the berries. 



Result.- — June 21, kernels as pluinp as those ripening freely in the 

 fields. The insects died some time between the 16th and 21th. 



Experiment 23. 



EuscMstus Jissilis Uhl. 



June 8, placed same number of adults upon same number of heads of 

 wheat and in same manner as in Experiment 22. 



Result. — June 21, a few kernels badly shrunken, but these do not 

 amount to over 6 per cent. Bugs now dead, but were alive up to the 

 20th. 



Experiment 21. 



Lygus pratensis L. 



June 8, placed four adults as in the preceding experiment. 



Result. — June 21, kernels do not differ from those grown elsewhere in 

 the field. One set of insects died on or about the 12th, the others 

 between 16th and 20th. 



EXPERI3IEXT 25. 



Siphonoplwra avence Fab. 



June 8, placed a number of adult females on heads of wheat as in the 

 preceding. 

 Result— June 21, kernels shriveled, discolored, and nearly worthless, 



