Marvels of insect life ; a popular account of structure and habit . .. from these rocks, both in Europe and in NorthAmerica, numerous fossilInsects have beenobtained. These carbo-niferous Insects comeclose to our modern cock-roaches in had four wings ofsimilar size and shape,but all transparent, likethe four wings of a ter-. Photo h\ rir. Tivs/. Head of Earwig. The fore-parts of tlif common earwig are here shown on a scale of twelve times the actualsize to illustrate the character of the mouth organs, which are admirably adapted for cutting. mite. In the moderncockroach, it will
Marvels of insect life ; a popular account of structure and habit . .. from these rocks, both in Europe and in NorthAmerica, numerous fossilInsects have beenobtained. These carbo-niferous Insects comeclose to our modern cock-roaches in had four wings ofsimilar size and shape,but all transparent, likethe four wings of a ter-. Photo h\ rir. Tivs/. Head of Earwig. The fore-parts of tlif common earwig are here shown on a scale of twelve times the actualsize to illustrate the character of the mouth organs, which are admirably adapted for cutting. mite. In the moderncockroach, it will be re-membered, the first pairof wings are thickened and opaque. In the carboniferous cockroach not only are allthe wings similarly transparent, but they also agree in having five nervures. Now, inthe modern cockroach, though the hind-wings have five nervures, those of the fore-wings have been reduced to four. So here we have evidence of two modificationsin cockroach wings. We see something of this modification in the trias and liasof the secondary, or mesozoic, epoch, where the fossils of cockroach-like Insectshave wings intermediate in character between those of the carboniferous and thoseof the present day. Ihe fossils of the carboniferous period appear to point to the fact that theorder 1 to which the cockroaches belong is cer
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecta, booksubjectinsects
