. Elements of entomology: an outline of the natural history and classification of British insects. Insects -- Great Britain. CHAPTER XI. HYMENOPTERA. Amongst the Neuroptera we have seen several groups of insects agreeing pretty closely in many respects, but differing remarkably in the character of their metamorphosis; amongst the Hymenoptera, on the contrary^ the metamorphosis is equally complete throughout; but the parts of the mouth which, in the earlier groups, present all the ordinary characters of the mandibulate structure, gradually change their form, until we find that only the mandible
. Elements of entomology: an outline of the natural history and classification of British insects. Insects -- Great Britain. CHAPTER XI. HYMENOPTERA. Amongst the Neuroptera we have seen several groups of insects agreeing pretty closely in many respects, but differing remarkably in the character of their metamorphosis; amongst the Hymenoptera, on the contrary^ the metamorphosis is equally complete throughout; but the parts of the mouth which, in the earlier groups, present all the ordinary characters of the mandibulate structure, gradually change their form, until we find that only the mandibles retain the power of biting, the other organs becoming con- verted into a regular suctorial apparatus. The exist- ence of strong horny mandibles, however, always shows these insects to belong to the mandibulate or biting section of the insect world. \ I. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Dallas, W. S. (William Sweetland), 1824-1890. London, J. van Voorst
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectinsectsgreatbritain
