. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. carpenter: lower PERMIAN insects of KANSAS 81 In working out the venation of this insect I was somewhat discon- certed bv the variabihtv of the structure of the radial sector. Some of the different types of branching which occur are shown in text figure 1. It will be observed that the position of the origin of Rs, as well as. Fig. 1.— Variations in the radial sector of venosa: A, No. 3003; B. No. 3004; C, No. 3005; D, No. 3007; E, No. 5669 (Yale). the point of origin of each of the four main branches of
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. carpenter: lower PERMIAN insects of KANSAS 81 In working out the venation of this insect I was somewhat discon- certed bv the variabihtv of the structure of the radial sector. Some of the different types of branching which occur are shown in text figure 1. It will be observed that the position of the origin of Rs, as well as. Fig. 1.— Variations in the radial sector of venosa: A, No. 3003; B. No. 3004; C, No. 3005; D, No. 3007; E, No. 5669 (Yale). the point of origin of each of the four main branches of this vein are constant; the variation takes place in the number and position of the additional forkings. A similar but less marked variation takes place in the radial sector and media of the recent Merope tuber. The new specimens of Platychorista venosa contained in the Harvard collection have added so many details to our knowledge that we are. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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