200 JOURNAL OP ECONOMIC ENTOMOLOGY [Vol. 3 



lower row rested on scantling. Each case was opened by loosening 

 the middle board at each end, that is, along the aisles, which end, 

 fortunately, was the butt end. We think that such an arrangement 

 and the opening of cases is very important for successful fumigation. 



The first fumigation took place on July 10th. The bulk of the first 

 brood had matured by this date. The beetles were numerous and 

 active, flying about the room, collecting at the windows, crawling over 

 the cases and laying eggs on the tobacco. A great many had died a 

 natural death before, since many dead ones were found on the window 

 sills and floor. No doubt many of these had previously laid their 

 eggs. Probably the building sliQulcl have been fumigated two weeks 

 before so as to prevent egg laying. The gas killed practically all 

 adults, pupae, and larvae. Although a few in each stage were found 

 alive in protected places in the interior of cases, but only a few. A 

 few adults were found at the windows immediately after ventilating 

 the rooms. These no doubt were stragglers who had left the building 

 and returned again or they may have come from some other house. 

 The windows from now on were kept closed to keep outside beetles 

 out. Fly paper was used liberally on the window sills and window 

 sashes to catch stray beetles, who were usually attracted to the light. 

 This proved to be useful. The most important floor was fumigated 

 four weeks after the first fumigation. The entire building was fumi- 

 gated to catch the second brood during the second week in September. 

 After this last fumigation there was relief from the pest. Workmen 

 say they have not seen any adults since. However, at this writing 

 (December), a few larvae have been found after careful searching. 



Let us now see the fate of another house which was not fumigated. 

 During the middle of September the second brood was at its height. 

 Beetles were evident by great numbers crawling over cases of tobacco, 

 in tobacco, at the windows and flying about wholesale. They were 

 most active about dusk. Although this house was not fumigated 

 they fought the insects with great vigor, using some novel methods, 

 which helped much to keep the pest down. As has been mentioned 

 before, the beetles are most active during the evening and since they 

 are attracted by light, advantage was taken of these factors. A 

 number of frames were arranged and lined with fly paper, placing a 

 light in the middle, for the night, to attract the beetles. This was kept 

 up during the bad season. Fly paper was tacked against cases and 

 freely suspended from beams. The papers were changed as soon as 

 they were covered with insects. 



Another method that deserves attention is that of a suction ar- 

 rangement. An electric motor was fastened to a force suction 



