. Elements of entomology: an outline of the natural history and classification of British insects. Insects -- Great Britain. Tipula oleracea. CHAPTER XIII. DIPTERA, OR TWO-WINGED FLIES. The insects to which I have alluded at the close of the last chapter, are the almost innumerable hosts of the two-winged Flies, forming the Order Diptera. Their most prominent characteristic is that referred to in their name: they possess only a single pair of mem- branous wings, traversed by branching veins, the posterior pair of wings being represented by two small knobbed filaments called halteres or balance
. Elements of entomology: an outline of the natural history and classification of British insects. Insects -- Great Britain. Tipula oleracea. CHAPTER XIII. DIPTERA, OR TWO-WINGED FLIES. The insects to which I have alluded at the close of the last chapter, are the almost innumerable hosts of the two-winged Flies, forming the Order Diptera. Their most prominent characteristic is that referred to in their name: they possess only a single pair of mem- branous wings, traversed by branching veins, the posterior pair of wings being represented by two small knobbed filaments called halteres or balancers^ placed one on each side of the hinder part of the thorax. The presence of the latter organs, indeed, seems to be the most essential character of the Diptera, as they exist even in a few species which are totally destitute of true wings; they sometimes project so much as to be mi. 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
