. Fig. Wing of Hh. sjnssirostris Q. This species cannot be confused with nigripes; besides the size, the design of thorax and the clear wings, it is distinguished in the male by the thickened front metatarsi and the curiously haired middle metatarsi, as well as by many other differences in the pilosity of the legs, and in the female by the shape of the discai cell, Rh. spissirostris seems not to be common here; it occurs near water; Amager Fælled, Hillerød, Boserup near Roskilde and on Falster at Resle. It is a spring species, my dates are '^'^/â ^â^^Ig; on the latter date I took it on A
. Fig. Wing of Hh. sjnssirostris Q. This species cannot be confused with nigripes; besides the size, the design of thorax and the clear wings, it is distinguished in the male by the thickened front metatarsi and the curiously haired middle metatarsi, as well as by many other differences in the pilosity of the legs, and in the female by the shape of the discai cell, Rh. spissirostris seems not to be common here; it occurs near water; Amager Fælled, Hillerød, Boserup near Roskilde and on Falster at Resle. It is a spring species, my dates are '^'^/â ^â^^Ig; on the latter date I took it on Amager Fælled flying lovv over a water pool to- gether with the following species. Zetterstedt notes (VIII, 3031) as communicated by Stæger âOccurrit . . tantum in litore maris", but this is not correct as the localities Hillerød and Boserup show. Geographical distribution: â Northern and middle Europe; its southern limit lies in Austria; towards the north to middle Sweden, and in Finland. 4. Rh. dissimilis Zett. 1849. Zett. Dipt. Scand. VIII, 3031, 2â3. â 1903. Kat. palÃ¥arkt. Dipt. II, 224. This species is very similar to spissirostris, and I shall therefore only describe it comparatively. Male. Somewhat larger than spissirostris; frons somewhat broader. Thorax much darker grey and shining, the two stripes hence much less distinct, especially outwards as the sides of the disc are rather dark; the stripes are broader than in spissirostris. The dorsocentral and acrostichal bristles slightly longer; all thoracic bristles black; on and behind the humeri there are fme, yellow hairs as in spissirostris. Abdomen and exterior genitalia quite as in spissirostris, the fan-like hairs at the hind margin of the segments stronger. Legs as in spissi-
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishercopenhagengecgad
