. The fossil insects of North America, with notes on some European species [microform]. Insects, Fossil; Insects; Insectes fossiles; Insectes. and ono or two dividing simply beyond tlie middle; nil of them nre straight or very slightly curved, the outermost extending fur toward the tip of the wing, so as to give this area an iinusual preponderance; it occupies indeed about one-fourth of the wing. The scapular vein runs subparallcl to the costal margin in a straight course through the middle of the wing to its extreme tip, so that this area and the mediastinal together oc- cupy fully one-half t
. The fossil insects of North America, with notes on some European species [microform]. Insects, Fossil; Insects; Insectes fossiles; Insectes. and ono or two dividing simply beyond tlie middle; nil of them nre straight or very slightly curved, the outermost extending fur toward the tip of the wing, so as to give this area an iinusual preponderance; it occupies indeed about one-fourth of the wing. The scapular vein runs subparallcl to the costal margin in a straight course through the middle of the wing to its extreme tip, so that this area and the mediastinal together oc- cupy fully one-half the wing, dividing it between them by a straight and very oblique line; this vein emits four or more long straight branches parallel to the outer mediastinal branches, all of them, with the possible exception of an apical, forking once at or beyond their middle. The extcrnomedian vein begins to fork at about the middle of the wing with dichotomizing branches which, however, do not separate widely and occupy on the margin only the lower half of the broad apex; these branches cannot be called either superior or inferior, as the forks port equally in opposite directions. On the inner margin the internomedian area occupies less space than the anal, and is filled with a number of closely approximate parallel veins scarcely curved and directed obliquely in an oppo- site sense to those of the mediastinal area. The anal furrow is deeply impressed, broadly curved, and strikes the middle of the inner margin. The wings are peculiar for their extreme breadth and rounded outline; the costal bor- der is not greatly curved so that the tip of the wing is unusually blunt; they are broadest in the middle, and scarcely twice as long as broad. Besides the upper wings and the unusually broad pronotal shield, some few unimpor- tant veins of the hind wings occur, but too insignificant to have any special value. The genus differs from Mylacris, with which it best agrees, in the form of the wing, which
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1890
