Diptera danica : genera and species of flies hitherto found in Denmark . erwhite and sterna black haired. Abdomen slightly shining, with erectblack hairs, placed more or less distinctly as a transverse row oneach segment; the hairs are specially dense and tuft-like at the sidemargins, they are white at the side margin of the first segment. Atthe hind margin of the second and third segments there are foursilverwhite spots, formed of scaly hairs, one on each side and twoin the middle; they may in some cases be somewhat confluent to aband; sometimes there are similar spots also on the
Diptera danica : genera and species of flies hitherto found in Denmark . erwhite and sterna black haired. Abdomen slightly shining, with erectblack hairs, placed more or less distinctly as a transverse row oneach segment; the hairs are specially dense and tuft-like at the sidemargins, they are white at the side margin of the first segment. Atthe hind margin of the second and third segments there are foursilverwhite spots, formed of scaly hairs, one on each side and twoin the middle; they may in some cases be somewhat confluent to aband; sometimes there are similar spots also on the fourth and fifth Diptera Danica. II. 7 98 Orthorrhapha brachycera. segments; at the hind margin of the sixth segment there is a similar,silverwhite band, divided in the middle. Venter black haired. Legsblack or brownish black; the hairs, both the scaly and the otherones, as well as the bristles, black; the scaly hairs on some placeswith a more or less whitish reflex. Wings brownish black, only clearat the apex and partly at the hind margin; the border of the blackish. Fig. 34. Wing of A. anthrax. part goes about from the apex of the subcostal vein somewhat out-wards to the base of the fork of the cubital vein and then veryundulating or in a zigzag to the apex of the anal cell; the undulationis caused by the blackish colour stretching more or less out along theveins towards the hind margin; at the apex of the radial vein thereis a small, isolated spot; at the posterior upper corner of the discal cellthere is a somewhat pronounced clear spot. The costa is black haired atthe base; squamulse with white hairs at the margin. Halteres black. Female. Agreeing with the male, only the frons slightly broader,and the inner eye-margins diverging just from the upper corner. Length 7—1°2 mm. A. anthrax is very rare in Denmark; we have only three speci-mens from earlier time, and without particular locality. Geographical distribution: — Europe down into Italy; towards thenorth to norther
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