. The Cambridge natural history. Zoology. io6 ORTHOPTERA the metanotiim (the part of the body that in the winged forms bears the wings, and which is marked c in our diagrams, Fig. 106), so that the tegmina are to all appearance less rudimentary (or vestigial) than the wings. The metanotum forms a sort of Hap, called by Fischer ^ " involucriim alarum " ; he considered the part immediately behind this to be the metanotum; this piece is, however, no doubt really part of the abdomen (d in our Figure). This is apparently the view taken by The structure of these parts is importan
. The Cambridge natural history. Zoology. io6 ORTHOPTERA the metanotiim (the part of the body that in the winged forms bears the wings, and which is marked c in our diagrams, Fig. 106), so that the tegmina are to all appearance less rudimentary (or vestigial) than the wings. The metanotum forms a sort of Hap, called by Fischer ^ " involucriim alarum " ; he considered the part immediately behind this to be the metanotum; this piece is, however, no doubt really part of the abdomen (d in our Figure). This is apparently the view taken by The structure of these parts is important as bearing on the subject of the nature and origin of Insects' wings, a question to which no satisfactory answer has yet been given. The appearances we have remarked on are to some extent similar to the con- ditions existing in the immature state of the organs of flight in the common earwig (see Fig. 112, p. 212), but whether the varieties presented by the wingless forms have parallels in the immature conditions of the various winged forms is quite uncertain, the life-histories of earwigs being almost unknown. The developed wings of earwigs are worthy of attention, both as regards their actual structure and the manner in which they are folded up in repose. "When B #. Fig. 107.— Wing of Fmficula expanded they have a shape cuiiously suggestive of the human ear. The chief parts of the wing, as shown in Fig. 107, A, are a, b, two portions of the horny piece that forms the scale which covers the more delicate parts of the wing when it is folded, and which, according to Brunner, represents the radial and auricuiaria. "a, Wing ex- nlnar fields of the wings of Acridiidae panded, in text ; and LoCUStidae (sCe Fig. 167)- C is B, wmg folded and packed. ^ t> ^^ ' J > '^ -^o the small apical field limited below by the vena dividens; d is the vena plicata which runs along the under side of the scale as far as the apical field, where it gives off the axillary
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
