| Popis: |
DIFFERENTIAL reactions to various wave-lengths or wave-length bands, independent of intensity, have been claimed for several members of the group of Diptera1–4. None of the authors concerned, however, had based his experiments on the training method which, when applied to honey-bees, had yielded more detailed and exhaustive results than any other method5,6. It may therefore be of interest that a solitary insect belonging to the group of Diptera has been trained to colours successfully for the first time, in preliminary experiments carried out in this Department. |
