The Wings of Insects: An Exposition of the Uniform Terminology of the Wing ...
The Wings of Insects: An Exposition of the Uniform Terminology of the Wing ...
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Figure 132 represents the base of a fore wing of this species in which all of the veins of the subcosto-radial area are preserved.
Holmgren (*ii) figures the base of a fore wing of this species in which there are only four veins crossing the humeral suture in front of media.
This condition corres- ponds with the trach- eation of a wing of a nymph represented in Figure 130 ; and I believe that the veins in the indi- vidual figured by Holm- gren should be identified as are the tracheae in Figure ...130. Holmgren recognizes a subcosta, a double "radius" (t.e.Ri), and a radial sector, which is my R4+6. The differ- ences between our inter- pretations of the homo- logies of these veins is doubtless due to his con- clusion that in Mastotermes vein Ri is represented by two distinct parallel veins, a conclusion that is based on what I regard as an instance of aberrant tracheation as stated above.
The hind wing of the Termopsis angusticolUs figtired here (Fig. 131) differs from the fore wing in that there are only two distinct veins between vein R4+6 and the thickened costal margin.
What to read after The Wings of Insects: An Exposition of the Uniform Terminology of the Wing ...?
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To quickly assess the difficulty of the text, read a short excerpt:
Figure 132 represents the base of a fore wing of this species in which all of the veins of the subcosto-radial area are preserved.
Holmgren (*ii) figures the base of a fore wing of this species in which there are only four veins crossing the humeral suture in front of media.
This condition corres- ponds with the trach- eation of a wing of a nymph represented in Figure 130 ; and I believe that the veins in the indi- vidual figured by Holm- gren should be identified as are the tracheae in Figure ...130. Holmgren recognizes a subcosta, a double "radius" (t.e.Ri), and a radial sector, which is my R4+6. The differ- ences between our inter- pretations of the homo- logies of these veins is doubtless due to his con- clusion that in Mastotermes vein Ri is represented by two distinct parallel veins, a conclusion that is based on what I regard as an instance of aberrant tracheation as stated above.
The hind wing of the Termopsis angusticolUs figtired here (Fig. 131) differs from the fore wing in that there are only two distinct veins between vein R4+6 and the thickened costal margin.
What to read after The Wings of Insects: An Exposition of the Uniform Terminology of the Wing ...?
You can find similar books in the "Read Also" column, or choose other free books by Comstock, John Henry, 1849-1931 to read onlineMoreLess
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