MICHIGAN STATE POMOLOGICAL SOCIETY. 309 



Hull partially performed a like experiraeufc, and I did the same 

 myself; but we were met by the adyocates of the double- 

 brooded theory with the objection that such a test was of no 

 value, as the curculio would not deposit on plucked fruit, or 

 in confinement ; and to add weight to their argument they 

 would cite us to numerous instances among butterflies, to 

 prove that many insects really will not deposit in confinement. 

 But, as we shall see, they placed too much confidence in the 

 instinct of Mrs. Turk when, from such premises, they made 

 these deductions apply to her. As I proved over and over 

 again, the question could not be solved, with any more cer- 

 tainty, by confining beetles to living boughs containing fruit, 

 as the boughs could not well be covered with any substance 

 through which the beetles would not gnaw their way out. So 

 I determined lp«t spring to build a frame over a large tree 

 and entirely enclose it in stout gauze, that would neither let a 

 flea in or out, — much less a curculio. Having accomplished 

 this before the blossoms had fallen off the tree, I awaited with 

 pleasurable interest the result from day to day, from week to 

 week, and from month to month, engaging a competent person 

 to watch when, from necessity, I was obliged to be away. It 

 were worse than waste of time to detail here the many interest- 

 ing observations made on this tree which I liad under control, 

 or to enumerate the many other experiments which I con- 

 ducted in other ways, or the innumerable facts obtained ; and 

 it will sutTice to give in a summary manner the results, premis- 

 ing only that every precaution was taken, and no expense 

 spared, to prevent failure; that the experiments were satisfac- 

 tory beyond my expectations, the results conclusive beyond all 

 peradventure, and that I can prove every statement I make. 

 To sum up, then : The Plum (Jurculio is single-brooded, and I 

 have with me a number alive and kicking which wei'e bred 

 during the latter part of June from the first stung peaches- 

 [These beetles, warmed by the artificial temperature of the 

 hall, were quite active, and were feeding ravenously on a piece 



