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Show 188 7-] VALUE OF COLOUR AND MARKINGS IN INSECTS. 259 continued). Experimental evidence. E. B. Poulton. OP OTHER CLASSES (continued). Often seized and swallowed by Frogs; but I believe nearly always rejected in the end, and very often rapidly ejected soon after being seized, as though the animal had been stung. Often eaten by hungry Lizards ; but they showed great caution in their manner of seizing and disabling the insects. Seized and swallowed by Frogs ; but I believe nearly always rejected in the end, as above. J. Jenner Weir. Eaten by Z. vivipara. Refused by all the Lizards. Other observers. A.G.Butler.-Eaten by Frogs, apparently with avidity. Well known to be eaten by Lizards, and that Spiders also catch the Bees easily and frequently. Bearing upon Wallace's converse suggestion. Support; it seems clear that the Lizards do not much object to the secretion. It may be that this secretion or the means of using it is more formidable than in the winged females. These facts show that even an insect protected by a sting may fall a victim to enemies if hungry. The comparison with Wasps supports Wallace's suggestion. Conclusion as above. and deepest folds among the green leaves, they were nearly as well concealed. If a leaf became rolled up at the edge, there was certain to be a larva inside. The larvse were kept in a glass cylinder upon a plate, and the stem of the food-plant passed through a hole in the plate and into water in a stoneware vessel placed beneath. Sometimes the stem did not fit tightly in the plate, and then all the larvse crept through the hole and rested by day upon the stem above tbe water, where of course it was very nearly dark. I have had very similar experience with larvse found upon trees. I especially remember one instance in which the leaves were completely removed from the young shoots on one part of a plum-tree trained against the wall. I could not find the larva for several days, but finally detected it most carefully concealed in the folds of the single brown and withered leaf which still remained on that part of the tree. I have now given as much information as I possess of the habits by which this larva renders its brown imitative colouring as efficacious as possible for evading the eyes of its enemies. I have gone into details in order to show that the larva belongs to a class which is the |