. Diptera Danica: genera and species of flies hitherto found in Denmark. Diptera. 62 Orthorrhapha brachycera. 2. S. iridatus Scop. 1763. Musca, Scop. Ent. earn. 340, 914. — 1855. Low. Verb. zool. bot. Ver. Wien, V, 133. - 1903. Kat. palaarkt. Dipt. II, 32. — 1842. Sargus infuscatus, Zett. Dipt. Scand. I, 158, 3.^— 1862. Schin. F. A. I, 21. Male. Eyes metallic greenish, with an iridescent band lying above the middle, on the upper part of the eye, its end thus reaching the front somewhat above the white spot above the antenna. Front metallic green, with a pair of white spots above the antennae.
. Diptera Danica: genera and species of flies hitherto found in Denmark. Diptera. 62 Orthorrhapha brachycera. 2. S. iridatus Scop. 1763. Musca, Scop. Ent. earn. 340, 914. — 1855. Low. Verb. zool. bot. Ver. Wien, V, 133. - 1903. Kat. palaarkt. Dipt. II, 32. — 1842. Sargus infuscatus, Zett. Dipt. Scand. I, 158, 3.^— 1862. Schin. F. A. I, 21. Male. Eyes metallic greenish, with an iridescent band lying above the middle, on the upper part of the eye, its end thus reaching the front somewhat above the white spot above the antenna. Front metallic green, with a pair of white spots above the antennae. Antennae blacifish brown. Thorax golden greenish, finely yellowish pubescent. Abdomen more or less copper-coloured or violet, especially towards the apex. Venter black. Abdomen with fine, pale pubescence. Legs black or brownish black with yellow knees; femora finely Fig. 25. Wing of S. iridatus. tibiae and tarsi with short, yellow pubescence. Wings somewhat fumigated, generally slightly lighter at the base, with a pale brownish stigma and blackish brown veins. Halteres yellow. Female. Quite agreeing with the male, only the front is broader, and at the upper corner of the eye there is some violet colour; thorax has shorter and more whitish pubescence, and the abdomen is generally more or quite violet. Length 6—11 mm. The larva is dirty brownish or greyish brown; it has a length of about 10—12 mm. This species very much resembles cuprarius, but it is distinguished by the wing stigma not being blackish and the absence of the blackish brown blotch on the wing; a good character is also the higher position of the band on the eye, but this is generally not to be seen in dried specimens. — As the measurements show, this species, like cuprarius, varies much in size; Meigen has established a species, S. nitidus (Syst. Beschr. II, 108, 4) which is very similar to iridatus but smaller, and is said to have no band on the eyes. Low (Verhandl. zool. bot. Ver. Wien, V,
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Keywords: ., bookauthorlu, bookcentury1900, bookdecade1900, booksubjectdiptera
