Bactenal Disease of the Squash-hug. 



357 



they do not dry out as rapidly as those dying naturally. 

 Moreover, the color is apparently somewhat dulled. 



The success of the experiments in Table II. led to the 

 institution of a series of tests dealing with the effective- 

 ness of chinch-bugs dead from the disease as a source 

 of infection. The number of bugs, style of cage, and 

 other conditions were similar to those in the preceding 

 series. Man}' of the bugs had now passed the second 

 molt. The following table summarizes the results. 



Table III. 



Experiment No. 26 showed a greater number of deaths 

 than No. 25, but the number of bugs remaining at the 

 close was about equal in each, the former having con- 

 tained at the beginning more bugs than the latter. The 

 series is almost as conclusive as Table II. in showius: 

 how effectively the disease may act upon young chinch- 

 bugs; and it further supplements the results of the lat- 

 ter series in showing that the dead bugs from those in- 

 fected cages were capable of producing the disease anew, 

 while dead bugs from the check had no such power. 



The results with young chinch-bugs were so encour- 

 aging that a preliminary infection-box experiment was 

 imineiliately begun. Sqiiash-bugs recently killed by the 



