Philoliche (Ommatiosteres) angulata Fabricius, 1805 - Identification
Larger species (15.5-17 mm). Black. Only faint pale streaks on the thorax, and face shiny white. Proboscis short (4.8mm), abdomen black with an irregular shaped white band on T2 and interrupted bands on T5 and T6 (or T4, T5 and T6) of variable extent, can be only small stripes on the sides of the abdomen. Wings dark brown-grey.
Common pollinator in the Cape (fynbos & Karoo). Distributed from Cape Town to Namaqualand, and as far east as Gqeberh. Common in museum collections.
Photo of syntype (MNHN):
https://science.mnhn.fr/institution/mnhn/collection/ed/item/ed6562?listIndex=68
https://www.gbif.org/occurrence/1265038279
Illustration by Austen:
https://www.biodiversitylibrary.org/item/75729#page/251/mode/1up
Description by Wiedemann
https://www.biodiversitylibrary.org/item/50649#page/139/mode/1up
Description by Loew
https://www.biodiversitylibrary.org/item/35325#page/38/mode/1up
The form sexfasciata has been described by Walker:
Walker, F. 1848. List of the specimens of dipterous insects in the collection of the British Museum. Part 1. British Museum, London.
https://www.biodiversitylibrary.org/item/119311#page/146/mode/1up
In this form, the abdomen has six white bands on the hind borders of the segments; the first, second, fourth, and fifth entire; the third obsolete on each side ; the sixth obsolete in the middle.
Philoliche angulata form sexfasciata illustrated in Austen:
https://www.biodiversitylibrary.org/item/75729#page/249/mode/1up
Observations on iNat:
https://www.inaturalist.org/observations/65139640
https://www.inaturalist.org/observations/10794134
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