Chrysops brucei Austen, 1907

Mugasa, Claire M., Villinger, Jandouwe, Gitau, Joseph, Ndungu, Nelly, Marc Ciosi, & Masiga, Daniel, 2018, Morphological re-description and molecular identification of Tabanidae (Diptera) in East Africa, ZooKeys 769, pp. 117-144 : 117

Chrysops brucei Austen, 1907 Fig. 4G

Location.

Wakiso, Uganda

Descriprion.

Head. Head as wide as thorax with black eyes separated by dark brown frons. Frons widened slightly towards antennae and has black and brown long-standing hair. Callus black and glossy. Lower callus wider than long and oval shaped; upper callus with three ocelli arranged in triangular pattern (two lateral and one median ocellus) (Suppl. material 2: Figure S12A). Antennae black with long black hair. Scape and pedicel almost of equal length although scapes slightly longer. Flagellum equally slender with indistinctly marked annulations. Second segment of the palpus brown, slender with black hair; labellum black (Fig. 4G ; Suppl. material 2: Figure S12B).

Thorax. Black thorax with black and brown hair; sub-lateral stripes brown and reach posterior border of mesonotum. Basicosta of wing black with prominent thorn-like projection, while the costa is slender and long without longitudinal groove. Clear wing with longitudinal dark brown band that does not reach posterior margin. Fore leg dark brown with dark brown hair (Suppl. material 2: Figure S12B). Black halteres and stalk.

Abdomen. Abdomen black with black and white hair and parallel lateral sides that taper slightly at fifth segment. Each segment ashy grey at posterior margin with predominantly white hair. Indistinct greyish median stripe. Seventh segment rounded; ventral abdominal surface black with long fine whitish hair.

Figures

Figure 4. Key morphological features of sampled tabanid species. A Ancala fasciata B Tabanus donaldsoni green eyes (in fresh sample) C Tabanus donaldsoni, wing with distinct R 4 appendix (px), indistict hair tuft (hf) D Atylotus nigromaculatus, wing with short, clear appendix on R 4 E Haematopota duttoni, mottled wing with a right angled white thick line (in black circle) between vein A 1 and the wing margin, the R 4 has a long appendix F Haematopota fenestralis, shiny black callus on frons, eyes have bright coloured bands G Chrysops brucei, lateral view of head showing the antenna, black mouth parts and brown legs (partial).