. Insects, their ways and means of living. Insects. B Fig. 5 c. Fossil cockroaches from Upper Carboniferous rocks A, A' semoblatta mazorta, found in Illinois, length of wing one inch. (From Handlirsch after Scudder.) B, Phyloblalta carbonaria, found in Germany. (From Handlirsch) any of the modern insects, and in this respect they ap- parently stand closer to the hypothetical primitive insects than do any others that we know. And yet, the charac- ters by which these oldest known insects, called the Paleodictvoptera, differ from modern forms are so slight that they would scarcely be noticed by a
. Insects, their ways and means of living. Insects. B Fig. 5 c. Fossil cockroaches from Upper Carboniferous rocks A, A' semoblatta mazorta, found in Illinois, length of wing one inch. (From Handlirsch after Scudder.) B, Phyloblalta carbonaria, found in Germany. (From Handlirsch) any of the modern insects, and in this respect they ap- parently stand closer to the hypothetical primitive insects than do any others that we know. And yet, the charac- ters by which these oldest known insects, called the Paleodictvoptera, differ from modern forms are so slight that they would scarcely be noticed by anyone except an entomologist; to the casual observer, the Paleodic- tyoptera would be just insects. Their chief distinguish- ing marks are in the pattern of the wing venation, which is more symmetrical than in other winged insects, and, therefore, probably closer to that of the primitive ances- tors of all the winged insects. These ancient insects probably did not fold the wings over the back, as do most present-day insects, showing thus another primitive 90. 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 Snodgrass, R. E. (Robert E. ), 1875-1962. New York Smithsonian Institution series
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Keywords: ., bookauthorsnodgrassrerobert, bookcentury1900, booksubjectinsects
