Archive image from page 606 of Diptera Danica genera and species Diptera Danica: genera and species of flies hitherto found in Denmark dipteradanicage01lund Year: 1907 Empididae. 255 front femora there is a bristle on the anterior and posterior side, on the middle femora a specially strong bristle on the anterior side; the hind tibise have fine, slightly longish hairs above and below, and all tibiae have apical spurs. The hairs are paler or darker brownish, the bristles blackish. Wings hyaline. Veins blackish brown; the cross- veins near to each other: the discal vein thin from somewhat afte
Archive image from page 606 of Diptera Danica genera and species Diptera Danica: genera and species of flies hitherto found in Denmark dipteradanicage01lund Year: 1907 Empididae. 255 front femora there is a bristle on the anterior and posterior side, on the middle femora a specially strong bristle on the anterior side; the hind tibise have fine, slightly longish hairs above and below, and all tibiae have apical spurs. The hairs are paler or darker brownish, the bristles blackish. Wings hyaline. Veins blackish brown; the cross- veins near to each other: the discal vein thin from somewhat after Fig. 113. Wing of , the mediastinal vein not seen. the base to a little beyond the postical cross-vein, the last part of the vein is slightly undulated. Halteres brownish yellow to brownish. Female. Quite similar to the male, only the abdomen pointed. Length 1,6—2 mm. I have determined this species by comparison with specimens of aterrima sent to me from Mr. Verrall, but in reading Loew's descrip- tion of his nervosa, which according to the Kat. palaarkt. Dipt, is identical with nigritella Zett., I find no distinguishing character, e. g. the absence of the bristles on the anterior part of the thoracic disc, the bristles on the legs and the venation of the wings are quite in accordance; I have therefore no doubt, that aterrima Curt, and nigri- tella Zett. = nervosa Loew are identical. D. aterrima is somewhat rare in Denmark, but has however been taken on several localities; at Copenhagen (Schlick), Rorvig (the author); on Moen at Maglevandsfaldet (J. G. Nielsen); on Langeland at Lohals (the author) and in Jutland at Nymindegab (Th. Mortensen). The dates are 2—/7; on the former date it was taken with the sieve in flood refuse at Copenhagen, it was present in rather great numbers, and it would thus seem as if it hibernates as imago. Geographical distribution:— Northern and middle Europe down into Germany; towards the north to southern Sweden. 2. D. setigera L
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