. Fig. 119. Wing of S. graminum. ting before the middle of the wing; the cubital vein unforked, thus one cubital cell; the discai vein likewise unforked, thus three posterior cells; no discai cell; the lower branch of the postical vein wanting and no anal vein present; first basal cell short and narrow, second longer and much broader. No stigma. Axillary lobe somewhat devel- oped. No alula. Alar squamula very small, a little fringed at the margin. The developmental stages are not known. ^ It will thus be seen, as also shown by tig. IIS, that the arista is not in reality dorsal, but seen with a
. Fig. 119. Wing of S. graminum. ting before the middle of the wing; the cubital vein unforked, thus one cubital cell; the discai vein likewise unforked, thus three posterior cells; no discai cell; the lower branch of the postical vein wanting and no anal vein present; first basal cell short and narrow, second longer and much broader. No stigma. Axillary lobe somewhat devel- oped. No alula. Alar squamula very small, a little fringed at the margin. The developmental stages are not known. ^ It will thus be seen, as also shown by tig. IIS, that the arista is not in reality dorsal, but seen with a lens it looks so, because the process from the third joint is then taken to be the basal part of the arista, and also because the hairs on the lower side of the third joint seem to form part of the joint; in reality there is only a slight difference between the facts here and in D. ater- rima, while in setigera the arista is more distinctly terminal.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishercopenhagengecgad
