. Elementary entomology. Insects. CHAPTER IX THE NERVE-WINGED INSECTS, SCORPION-FLIES, CADDIS-FLIES, MAY-FLIES, STONE-FLIES, AND DRAGON-FLIES The earlier naturalists grouped all of the insects having four membranous wings with numerous fine cross veins, or nervures, as they were then called, into the order Xeuroptera, or nerve-winged insects, from neuron (nerve) and/te;w/ (wing). Further study has mm^m. 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 r
. Elementary entomology. Insects. CHAPTER IX THE NERVE-WINGED INSECTS, SCORPION-FLIES, CADDIS-FLIES, MAY-FLIES, STONE-FLIES, AND DRAGON-FLIES The earlier naturalists grouped all of the insects having four membranous wings with numerous fine cross veins, or nervures, as they were then called, into the order Xeuroptera, or nerve-winged insects, from neuron (nerve) and/te;w/ (wing). Further study has mm^m. 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 Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882. Boston, New York [etc. ] Ginn and Company
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