0 a large tube, wide at one end, through which large amounts of small separate things, for example seeds, can be moved from one container to another -- 漏斗
There is no doubt that the survivors of the 1932 hopper campaign were reverting to the solitary phase in the area.
All the hoppers were comatose and none was seen in the act of feeding.
This may explain the occurrence of apparently unparasitised hoppers of the pallid type.
In many cases it was observed that pallid hoppers were sluggish and easier to catch than the normal hoppers.
He predicted28 that the hopper was unstable if the thrust occurred at maximum compression.
The first generation studied were partly composed of stragglers from hopper bands and flying swarms.
They ate large numbers of hoppers and scattered the bands, so that no swarms of adults were produced.
They are unanimous in saying that hoppers were far more numerous in 1930 and 1931 than they had ever been before.
