. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. 246 Orthorrhapha brachycera. bristles; further a notopleural and a supraalar bristle present. Scutel- lum with two marginal bristles. Metapleura with a few bristles. ^ Abdomen consists of eight segments. The exterior male genitalia are large, they resemble somewhat the genitalia in Hilara; the seventh and eighth abdominal segments are lower than the preceding and covered by the genitalia; these latter consist of a large, strongly com- pressed piece, which above and in front has a pair of lamellæ with
. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. 246 Orthorrhapha brachycera. bristles; further a notopleural and a supraalar bristle present. Scutel- lum with two marginal bristles. Metapleura with a few bristles. ^ Abdomen consists of eight segments. The exterior male genitalia are large, they resemble somewhat the genitalia in Hilara; the seventh and eighth abdominal segments are lower than the preceding and covered by the genitalia; these latter consist of a large, strongly com- pressed piece, which above and in front has a pair of lamellæ with hooks; perhaps the lower piece answers to the ventral lamella. In the female the abdomen is pointed towards the apex and terminates with a thin ovipositor formed of two small, slightly downwards curved styliform lamellæ. Legs thin and slender; the front coxæ elongated, more than half as long as the femora; the front femora thickened in both sexes, with two rows of strong bristles below, and besides with rows of very small, tubercle-shaped spines; the front tibiæ are a httle curved and can be laid up towards the femora between the rows of the bristles; the front legs are thus raptorial as in Hemerodromia. For the rest the legs are short-haired; tibiæ without apical spurs. There are two claws, two small pulvilli and a small, linear empodium. Fig. 109. Wing of Ch. melanocephala. with bristles at the margin. Wings with the subcostal vein short; the cubital vein unforked, thus one cubital cell; the discai vein forked and thus four posterior cells; no discai cell; the lower branch of the postical vein going straightly downwards; the second basal cell a little shorter than the first, the anal cell as long as the second basal cell; anal vein not reaching the margin. No stigma. Axillary lobe not developed. No alula, the wing-margin here only short fringed. Alar squamula very narrow, with some long hairs at the margin. The developmental stages are not known. The small and delicate s
Size: 2593px × 964px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishercopenhagengecgad
