The Moths of the British Isles: Comprising the Families Sphingidae to Noctuidae and the Families Noctuidae to Hepialidae (Complete)
9781465676023
213 pages
Library of Alexandria
Overview
As mentioned in "Butterflies of the British Isles," there is, speaking generally, no clear line of division between moths and butterflies, and, as Dr. Sharp, in "Insects," puts the case, "the only definition that can be given of Heterocera [moths] is the practical one that all Lepidoptera that are not butterflies are Heterocera." Now, it happens that all the butterflies occurring in these islands have the tips of the horns (antennæ) clubbed; and, although there is much variety in the structure of the horns of our moths, none of them have the tips knobbed. Like the butterflies, moths pass through the stages of egg, caterpillar, and chrysalis before they attain the perfect state (imago), and the duration of the several stages is just as variable. The majority assume the moth condition but once in the year, but some species have two, or even three, generations in the twelve months, whilst others occupy twenty-four months in completing the life cycle. In one or two species the chrysalis stage may last four, five, or even six years. Diversity of form and structure is considerable in the early stages as well as in the perfect insects, and this is shown in the selection of life-history details figured on the black and white plates in this volume. Except that it is generally less prominent, the head, with the various parts thereof, is pretty much the same as in the butterflies. In a few families, however, the "tongue" (proboscis) is only rudimentary or even entirely absent; while in others it is very long. The Convolvulus Hawk-moth has the proboscis of such length that it is able to reach the deep-seated nectary of such tubular flowers as those of Nicotiana affinis. In the illustration the "tongue" of the moth and the sweet-scented tobacco blossom are shown on exactly the same scale.
