they then emit a powerful odour, both being means to attract the required co-operation. But of course our clients have nothing to do with these night-blooming flowers, as I am not aware of a single instance of a night-flying bee; nor are they on the wing very late in the evening, being before sunset, already in their nidus. In those occasional cases where the nectarium of the flower is not perceptible, if the spur of such a flower which usually becomes the depository of the nectar that has oozed from the capsules secreting it, be too narrow for the entrance of the bee, and even beyond the reach of its long tongue, it contrives to attain its object by biting a hole on the outside, through which it taps the store. The skill of bees in finding the honey, even when it is much withdrawn from notice, is a manifest indication of the prompting instinct which tells them where to seek it, and is a matter of extreme interest to the observer, for the honey-marks—the _maculæ indicantes_—surely guide them; and where these, as in some flowers, are placed in a circle upon its bosom, as the mark upon that of Imogen, who had— “On her left breast A mole cinque-spotted, like the crimson drops I’ the bottom of a cowslip.”—_Shakspeare._ they work their way around, lapping the nectar as they go. To facilitate this fecundation of plants, which is Nature’s prime object, bees are usually more or less hairy; so that if even they limit themselves to imbibing nectar, they involuntarily fulfil the greater design by conveying the pollen from flower to flower. To many insects, especially flies, some flowers are a fatal attraction, for their viscous secretions often make these insects prisoners, and thus destroy them. To the bees this rarely or never happens, either by reason of their superior strength, or possibly from the instinct which repels them from visiting flowers which exude so clammy a substance. It is probably only to the end of promoting fertilization by the attraction of insects that the structure of those flowers which secrete nectar is exclusively conducive, and which fully and satisfactorily explains the final cause of this organization. To detect these things, it is requisite to observe nature out of doors,—an occupation which has its own rich reward in the health and cheerfulness it promotes,—and there to watch patiently and attentively. It is only by unremitting perseverance, diligence, and assiduity that we can hope to explore the interesting habits and peculiar industries of these, although small, yet very attractive insects.