. The biology of insects. Insects -- Biology. 294 THE BIOLOGY OF INSECTS This wonderful and beautiful " wheel-foot " is character- istic of the allied Trochopus (Fig. 74, c, d), whose species, wingless and marine, skim over the surface of tropical American seas not far from land. They are covered with dense velvety hairs, and as a result carry down with them an air-bubble when they dive ; this adaptation, common to a. Fig. 74.—J, Veliid Marine Bug {Trochopus plumbeus), Jamaica, X 10. b, fore foot with anchoring claws; c, intermediate foot with " wheel" of feathered bristles
. The biology of insects. Insects -- Biology. 294 THE BIOLOGY OF INSECTS This wonderful and beautiful " wheel-foot " is character- istic of the allied Trochopus (Fig. 74, c, d), whose species, wingless and marine, skim over the surface of tropical American seas not far from land. They are covered with dense velvety hairs, and as a result carry down with them an air-bubble when they dive ; this adaptation, common to a. Fig. 74.—J, Veliid Marine Bug {Trochopus plumbeus), Jamaica, X 10. b, fore foot with anchoring claws; c, intermediate foot with " wheel" of feathered bristles, X 45; d, portion of "wheel," X 150. After G. H. Carpenter {Ent. Mo. Mag. 1898). large number of aquatic insects, must be of especial value to those that venture on the surface of the sea. The true pond-skaters (Gerris) with their elongate slender legs are, as we have seen, among the most specialised of freshwater insects that live on the surface-film. Members of a related genus, Metrocoris, with several species on the. 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 Carpenter, George H. (George Herbert), 1865-1939. New York, The Macmillan Company
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