Archive image from page 273 of Diptera Danica genera and species Diptera Danica: genera and species of flies hitherto found in Denmark dipteradanicage01lund Year: 1907 92 Orthoirhapha brachycera. 1. Anthracinae. 1. Antenna four-jointed, the styliform part being divided, at the apex with a pencil of hairs; metapleura bare. . 1. Argyramoeha. — Antennae three- or four-jointed, the styliform part with a small bristle at the apex; metapleura with long hairs 2. 2. Pulvilli well developed: antennae three-jointed 2. Hemipenthes. — Pulvilli wanting or at all events very small; antennae three- or four
Archive image from page 273 of Diptera Danica genera and species Diptera Danica: genera and species of flies hitherto found in Denmark dipteradanicage01lund Year: 1907 92 Orthoirhapha brachycera. 1. Anthracinae. 1. Antenna four-jointed, the styliform part being divided, at the apex with a pencil of hairs; metapleura bare. . 1. Argyramoeha. — Antennae three- or four-jointed, the styliform part with a small bristle at the apex; metapleura with long hairs 2. 2. Pulvilli well developed: antennae three-jointed 2. Hemipenthes. — Pulvilli wanting or at all events very small; antennae three- or four-jointed 3. Anthrax. 2. Bombyliinae. 1. First posterior cell closed, anal cell open; metapleura with long hairs 2. — First posterior cell open, anal cell closed; metapleura bare 6. Fhthiria. 2. Medial cross vein almost at the middle of the discal cell, thus the first basal cell longer than the second. . 4. Bomhylins. — Medial cross-vein near the base of the discal cell, thus the basal cells of about equal length 5. Systoechus. 1. Argyramoeba Schin. (Argyromoeba). [Anthrax Scopoli 1763.) Species of medium size and of deep black colour, generally with silvery spots; the wings more or less variegated with black, rarely quite hyaline. Head nearly globular but cut off behind and very deeply excavated, about as broad as thorax: at the hind edge of the excavation there is a dense fringe of hairs. Eyes large, higher than broad, separated in both sexes, but more so in the female than in the male; the posterior eye-margin is emarginate at the sides and from the top of the emargination an incipient dividing line stretches some way forwards, but the facets are of equal size. Antennae inserted in the middle, somewhat distant. Jowls very small, not descending below the eyes, only consisting of a narrow margin. Antennae four-jointed, the first joint short, cylindrical, the second disciform, the third with a globular, somewhat flattened base suddenly tapering into a Fig. 33. Antenna of
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