. Monographien der Diptera von Nordamerika [microform]. Diptera; Insekten; Diptères; Insectes. - T!! .. / (I t "i-V * *,. 2 (; 2 NORTH AMERICAN TRYPETINA. Ab tlic Spitze des ersten als von tliat der Tlic secoiul Vene. Ich nehme diese crossvein eine konstante charat zu 'ter des spct sein - sein, wie Sie es auf beiden Flügeln der luy Muster, und wie die verschiedenen Eng alliid Gonyyl Trypetidae, zum Beispiel. Wie. demanni und C'apnun. vfsu - viana, habe es ebenfalls, obwohl unvollständig entwickelt. Das Bild der Flügel ist nicht im Gegensatz zu Th.?; der T. atra, im Design sowie in seiner Färbung; Der schwarze s |) ot ui)

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Dieses Bild ist ein gemeinfreies Bild. Dies bedeutet, dass entweder das Urheberrecht dafür abgelaufen ist oder der Inhaber des Bildes auf sein Urheberrecht verzichtet hat. Alamy berechnet Ihnen eine Gebühr für den Zugriff auf die hochauflösende Kopie des Bildes.

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. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. -t !! .. /(i t » i-.V* *, . 2(;2 NORTH AMERICAN TRYPETINA. from tlic tip of the first than from tliat of tlic secoiul vein. I take this crossvein to be a constant charat'ter of the spct-its, as it exists on both wings of luy specimen, and as several closely alliid Trypetidae, for instance Gonyyl. Wie.demanni and C'apnun. vfsu- viana, have it likewise, although incompletely developed. The picture of the wings is not unlike th.?; of T. atra, in its design as well as in its coloring; the black s|)ot ui)on the ba<is of the wings does not cover their extreme root, and extends, on the anterior margin, only very little beyond the humeral crossvein ; it hardly reaches beyond the first longitudinal vein, and dissolves in several radiating points, which occupy the longitudinal middle of the marginal and of the three basal cells and almost conic in ('()ii- tact (except the hindmost), with similar rays, meeting them from the opposite side and emitted by the first crossband; the first black crossband has almost the same position as in the three ]»re- ceding species, but it is much narrower, especially towards its end, which reaches the posterior margin; its interior does not show any brownish tinge. The second band runs over both cross- veins, exactly as it does in those three species, and is connected with the first on the anterior margin in the same manner as this is the case in T. atra; the stigma, lying within this connecting portion, is very slv "i the veins surrounding it have, on the inner side, a very nairow hyaline border; the interior of the second band is for the most part brownish. The last black band begins in the marginal cell somewhat beyond the supernumerary crossvein in this cell, and reaches some distance beyond the end of the fourth vein; as far as this vein, it is separated from the margin of the wing by a narrow hyaline border, which somewhat projects on

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• bookcentury1800
• bookdecade1870
• booksubjectd
• booksubjectinsects