Behavioural studies of the grasshopper Schistocerca americana were undertaken to identify the mechanisms that regulate the intake of dietary sterols. In the first experiment, grasshoppers were allowed to feed on spinach, a plant containing only unsuitable sterols; immediately after this first meal, a suitable or unsuitable sterol was injected into the haemolymph. Grasshoppers injected with unsu...

A Little while ago Mrs. A., a housewife in ^rpington, went on a bus. Though it sounds the east remarkable thing in the world, it was a tr'Umph in its way?because Mrs. A. had for Months had a fear of leaving her own house, which dipped her with a panic hand if she as much as stepped across the threshold. Marooned in her semi-detached just as irrevocably, it seemed, as a castaway, Mrs. A. had rea...