. The fossil insects of North America, with notes on some European species [microform]. Insects, Fossil; Insects; Insectes fossiles; Insectes. 279 nomothetas fossilis. On nccount iniiinly of a tronsvorsc vein noiir tlio buso of the wiiij:^, which I consiilorod liomoloffous with the arculus of niodiM-n Odonnta. wliile ahnost everv other foatiiie of the wing was distinctively n'tn-Odonate and generally Sialidan, 1 looked on this as the tyjie of a distinct, synthetic group, which I called lloinothetidae. a family " tlie connecting liidv between the Neuroptera proper and Pseudi)neuro
. The fossil insects of North America, with notes on some European species [microform]. Insects, Fossil; Insects; Insectes fossiles; Insectes. 279 nomothetas fossilis. On nccount iniiinly of a tronsvorsc vein noiir tlio buso of the wiiij:^, which I consiilorod liomoloffous with the arculus of niodiM-n Odonnta. wliile ahnost everv other foatiiie of the wing was distinctively n'tn-Odonate and generally Sialidan, 1 looked on this as the tyjie of a distinct, synthetic group, which I called lloinothetidae. a family " tlie connecting liidv between the Neuroptera proper and Pseudi); Dr. Ilagen, who has not seen the single original, says. "It is obvious that the wing belongs to the Sialina," and explains the so-called arculus as the end of a horny basal part of the wing, such as is seen in Corydalis. ••The fragnic'it," he says, "shows foreign to the Corydalis type, excepting a smaller nund)er of ; The re-examination of ' fo-m after a special study of a considerable nn:nber of later pa'.eozoic wings, some of wliicli ..gree tolerably closely in general structure with Homo- , apart from the supposed arculus in the latter, ccmviiu-es me that 1 have been mis- taken about this arculus. 1 ve. and that, what 1 strangely overlool'ied before, it is elevated, while the other veins about it arc (l; it , indeed, at a slightly higher level on the stone than the others, on a piece which shows a fracture tiirther away from the base of the wing, where the first separation of what I then co.\sidered the main scajjular branch and the externomedian vein takes place. Upon this elevated i)iece that portion of the supposed branch lying between the so-called arculus and this separation is placed, and if we discard one we discard also the other; that is. these veins do not gamate at their base and curve downward (in passing basoward), but, as a closer exanunatiou shows, feebly and unc
Size: 2712px × 921px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1890
