. The fossil insects of North America, with notes on some European species [microform]. Insects, Fossil; Insects; Insectes fossiles; Insectes. ! ! 1 ? ^- [1: 1. J 62 costal margin nearly across the basal fifth of the wing. The mediastinal area is exception- ally small for this genus, even if we consider, as is probable, a marginal half to be destroyed; the veins in the fragment of it are somewhat obscure, consisting of on]y two or three parallel to each other, the lower or inner forking twice near the base and terminating a little before the middle of the wing. The scapular vein suddenly bends
. The fossil insects of North America, with notes on some European species [microform]. Insects, Fossil; Insects; Insectes fossiles; Insectes. ! ! 1 ? ^- [1: 1. J 62 costal margin nearly across the basal fifth of the wing. The mediastinal area is exception- ally small for this genus, even if we consider, as is probable, a marginal half to be destroyed; the veins in the fragment of it are somewhat obscure, consisting of on]y two or three parallel to each other, the lower or inner forking twice near the base and terminating a little before the middle of the wing. The scapular vein suddenly bends at the end of the basal fifth of tlie wing and runs closely parallel to the costal margin lor a distance equal to about half the length of the wing, and then curves somewhat rapidly to a longitudinal direction, running down the middle line of the wing and terminating at its tip; its first vein, which like most of the others is deeply and simply forked, continues the direction of the basal part of the stem; the last is a shoot which parts from the main stem at about the middle of its longitudinal course; the intermediate ones, to the number of five, part at equal distances from one another in the oblique portion of the main stum, and are straight and parallel to the direction of the basal branch. The externomedian vein parts abruptly from the scapular vein shortly before the end of its basal course and runs subparallel to it, diverging gently from it in the apical half of the wing and emitting, at regular and distant intervals, three or four superior, gently arcuate, simple or forked longitudinal branches, commencing at a little before the middle of the wing, the first branch approaching tlic scapular vein and then continuing beside it; the area occupies only a narrow space at the extremity of the inner margin. The internomedian vein parts from the scapular just before the externomedian and in a nearly similar Avay; it runs nearly parallel to the latter, but with a very straigh
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1890
