. Fig. 9. Wing ot Bh. dissimilis 9. Female. Differing from the male in the same way as the female of spissirostris, but the wings have the discal cell normal though longer than in the male; outwards to and below it (in the third and fifth posterior cell) there are two faint, greyish or yellowish, oblong spots. The halteres are whiter. Length 5—6,5 mm. Zetterstedt mentions a variety with not maculated wings, and another variety with patches on the wings; of this latter he had only seen one specimen from Denmark, and he adds „E Smolandia quoque missu", but the whole passage seems to show, t
. Fig. 9. Wing ot Bh. dissimilis 9. Female. Differing from the male in the same way as the female of spissirostris, but the wings have the discal cell normal though longer than in the male; outwards to and below it (in the third and fifth posterior cell) there are two faint, greyish or yellowish, oblong spots. The halteres are whiter. Length 5—6,5 mm. Zetterstedt mentions a variety with not maculated wings, and another variety with patches on the wings; of this latter he had only seen one specimen from Denmark, and he adds „E Smolandia quoque missu", but the whole passage seems to show, that he had also only one female of the variety with not maculated wings. I think the patches may have disappeared by exsiccation; all specimens I have seen had them distinctly observable. Eh. dissimilis is more common in Denmark than spissirostris, that is to say, it is generally present in greater numbers, but it has only been taken on few localities; it occurs exclusively near water; Amager Fselled, Gharlottenlund, at Hornbaek and on Langeland at Lohals. It is a spring species as the preceding, my dates are ^"^/s—•^^\n. I took it on Amager Fselled flying low over a water pool in great numbers together with spissirostris, but this latter species was only present in single specimens; sometimes it was seen to swoop down on small particles flowing on the surface of the water, as in search for prey, but I never succeeded in taking it with prey. Geographical distribution: — The species is hitherto only known from the southern Sweden, Denmark and England. With us it is, as said, more common than spissirostris, but in Sweden the reverse seems to be the case.
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Keywords: ., bookauthorlu, bookcentury1900, bookdecade1900, booksubjectdiptera
