. Evenings at the microscope : or, Researches among the minuter organs and forms of animal life . Zoology; Microscopy; Microscopes. INSECXS : WINGS AND THEIR APPENDAGES. 81 of the entire scale is that of a battledore. The ribs are rather few and coarse, and they have this peculiarity, that each rib swells at intervals into rounded dilations, each of which has a minute black point in its centre. In some of these battledore scales there is, near the lower part of the expansion, a crescent of minute pigment-grains. The silvery grey surface of the front wings of a common moth, known as the Buff-ti
. Evenings at the microscope : or, Researches among the minuter organs and forms of animal life . Zoology; Microscopy; Microscopes. INSECXS : WINGS AND THEIR APPENDAGES. 81 of the entire scale is that of a battledore. The ribs are rather few and coarse, and they have this peculiarity, that each rib swells at intervals into rounded dilations, each of which has a minute black point in its centre. In some of these battledore scales there is, near the lower part of the expansion, a crescent of minute pigment-grains. The silvery grey surface of the front wings of a common moth, known as the Buff-tip {Pygara bucephala), is com- posed of scales of unusual magnitude, and of a remarkable form, their shape being that of an expanded fan, and being quite distinguishable by the unassisted eye. The' ribs are very fine and numerous, and there are diverging lines of pigment-grains running through the scale. Those of the Emperor Moth (Saturnia pavonia minor) are likewise triangular in outline, and are remarkable for being deeply notched at the end; so deeply as to leave projecting points (from two to five) as long as, or even longer than, the undivided portions of the scale. In some species we find scales the tips of which are furnished with a curi- ous sort of fringe. This slide presents several such in the midst of many of a more ordinary shape and appearance. The scales in question are straight, and parallel-sided, rather narrow, with the basal end rounded, and the terminal ex- tremity tapered abruptly to a point; it is on each slope of this point that the fringe is arranged. The surface does not appear to be elevated in ribs, but smooth ; while the whole interior, except a crescent around the foot-stalk, is filled with pigment-grains, imparting a mottled appearance. It is remarkable that all the scales of this form have the foot- stalk turned in under the expanse. The example which. phingkd 8cale op Please note that these images are extracted from scanned page images th
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