. The Quarterly journal of the Geological Society of London. H. BOLTON ON SOME INSECTS [vol. lxxii, The median divides low down near the base into two equalbranches, the outer of which gives off four successive twigs. Thefirst of these twigs (regarded by Handlirsch as the radial sector)arises before the branch reaches the middle of the wing, andremains undivided throughout the whole of its course to the innerangle of the tip of the wing. The second twig divides twice, theouter and inner twigs of the second bifurcation dividing again, sothat the ultimate twigs reaching the margin are six in num
. The Quarterly journal of the Geological Society of London. H. BOLTON ON SOME INSECTS [vol. lxxii, The median divides low down near the base into two equalbranches, the outer of which gives off four successive twigs. Thefirst of these twigs (regarded by Handlirsch as the radial sector)arises before the branch reaches the middle of the wing, andremains undivided throughout the whole of its course to the innerangle of the tip of the wing. The second twig divides twice, theouter and inner twigs of the second bifurcation dividing again, sothat the ultimate twigs reaching the margin are six in number ; theremaining hranches, which are three in number, remain simple andundivided. The anterior branch of the median occupies the greaterpart of the wing-tip, and ends upon it in seven twigs. The inner branch of the median is simpler in character than theouter, and does not divide until well past the middle of the wing. Fig. 1.—Restoration of wing of iEdoeophasma anglica Scudder,showing the general character of the intercalary venation.(Natural size.). It then gives off four twigs, which pass outwards to the junctionof the inner wing-margin with the apex. The first of the twigsforks before reaching the margin, and consecmently the innerbranch of the median has six ultimate twigs. The cubitus passes out from the base of the wing parallel to themain stem of the median and to its inner branch for the greaterpart of its length. It sends off at a wide angle, at the middle ofthe wing, a strongly-curved branch, which bends first inwards andthen outwards towards the apex, breaking up into five twigs beforereaching the inner margin. The second of these twigs forks. Asecond branch comes off a little farther out, and also at a wideangle. This remains undivided along its whole length. The mainstem of the median runs out to the margin, forming a small forkimmediately in front of it. The cubitus ends in the inner wing-margin in six twigs. The next two veins were probably united a little w
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Keywords: ., bookcentury1800, bookdecade1840, bookidquarte, booksubjectgeology
