Hesse (1969) described this species as follows: Male: Body in male mainly black, but with the following parts yellowish: antennae (except black terminal tubercle), palps, humeral tubercles, a spot on postalar calli, hind margins of tergites, hinder half and more than apical half of sides of tergite 4, greater part of tergites 5-7 (except for dark blackish brown sides basally and to a variable extent lateral margins), almost entire hypopygial structures, greater part of venter, and the legs (excepting dark coxae and a broad dark brownish or blackish brown annulation of variable extent in apical half of hind femora). Integument of middle part of frons, postalar calli, scutellum, metanotum, pleurae, and depressed base of tergite 2, as well as black bullae, highly polished, brilliantly shining; integument of thorax above and rest of abdomen above also shining, but with acicular setiferous punctures which become more 'nadelrissig' from tergite 3 ; that of legs also more or less shining. Vestiture with the hairs dense, long and villose as described for the genus, mainly snow whitish, but shorter ones on disc of thorax above and tergites 5-7 sometimes slightly tinted a little more yellowish; hairs on legs also mainly or entirely snow-whitish, though the shorter ones on hind femora above also sometimes tinted more yellowish; those on apical part of coxae below sometimes even more fulvous; hairs on hind femora below markedly dense and long, and those along inner part of hind tibiae also longish. Head with the interocular space on vertex not or scarcely broader than, or as broad as, interocular space on head below; antennae distinctly longer than thorax above (excluding scutellum); segment 1 about 1.6–2.3 times length of 2; segment 3 distinctly thickened club-like apically, shorter than club; latter elongate, obliquely subtruncate apically, sometimes broadest just beyond middle, then slightly narrowed; proboscis longer than vertical length of eye; palps distinct, subglobular or oval, not much, longer than antennal segment 2. Wings mainly hyaline, but costal part slightly more yellowish, the apical parts of costal, marginal and submarginal cells tinted yellowish brownish, and basal veins of second submarginal and first posterior cells, apical veins of discoidal cell, junction of first posterior, discoidal and third posterior cells and apical vein of anal cell also margined with faint yellowish brownish; veins yellowish; squamal margin pallid ; stump at base of second submarginal cell rather short; apex of discoidal cell very shortly stalked, meeting apex of third posterior cell almost at a point; knobs of halteres mainly yellowish. Legs with the hind femora distinctly, though slightly, thickened, clavate, armed below with a double row of yellowish spines from about middle or slightly beyond middle; apical spurs of tibiae, especially hind ones, rather long; tarsi with rather longish, bristle-like spicules ; basal segment of hind tarsi much longer than claw-segment; claws markedly long and slender, in these curved rather rapidly apically; pulvilli proportionally long and broadish. Hypopygium with rather longish bristly hairs apically on lobes of tergite 9, and with some coarse punctures on processes of sternite 9. Length of body: about 17-19 mm; Length of wing: about 12-13-5 mm.

Agaperemius is a monotypic genus with only one described species (Kirk-Spriggs and Sinclair 2017).

Type locality: South Africa, Northern Cape in Onseepkans.

This species is known to occur in southern Namibia and northwestern South Africa (Kirk-Spriggs and Sinclair 2017).

Specimens of this species were collected from Bushmanland: Onseepkans near Orange River (Museum staff, Oct. 1939) (holotype). Northern Cape: Putsonderwater in Gordonia, north of Kenhardt (Museum staff, Oct. 1939) (paratype) (Hesse 1969).

The information below was extracted from Cannings and Scudder (2005): Dipterans are primarily aerial insects and the mesothorax, which bears the only pair of wings, dominates the thorax - the prothorax and metathorax are greatly reduced. The legs are normally rather simple and are used primarily for perching; in some groups, they are modified for prey capture or for signalling during courtship. The tarsi are nearly always 5-segmented. The functional wings are membranous and their pattern of veins is critical in fly classification and identification. During the evolution of flies, there has been a trend towards a reduction in veins, especially in the rear half of the wing – changes that evidently relate to improvements in two-winged flight. The hindwings, present in most other insects, are reduced in Diptera to small, club-like organs, called halteres, used for stabilising flight.

Herbivore - Nectarivore (nectar-eating)

The flies in this family are not known to hunt, catch or prey upon other insects as asilids do (Hesse 1969). Not much information is available on the ecology of Agaperemius.

Like the others, flies in the Mydidae family begin life as an egg, which hatches into a grub-like larva. Most of the fly life is spent in the larval stage, mainly eating and growing, as well as molting several times. Some flies may spend at least a year as a larva. The next stage is a pupa, during which the insect transforms into its final stage, emerging from the pupa as a winged adult, able to mate and reproduce. In many species, males stake out positions at favourable egg-laying sites and wait for females to arrive (Hesse 1969).

Probably Nama- and Succulent Karoo.