Diopsis longicornis Macquart, 1835 Diopsis longicornis: Macquart 1835: 486 (Type locality: ‘Guinée’ and Senegal); Steyskal 1972: 9; Feijen 1987: 410, 413. Diopsis thoracica Westwood, 1837 a: 306 (Type locality: West Africa). Diopsis phlogodes Hendel, 1923: 37 (Type locality: Kenya). Distribution: Most of sub-Saharan Africa, including Benin, Botswana, Burkina Faso, Cameroon, Central African Republic, Chad, Ethiopia, Gambia, Ghana, Ivory Coast, Kenya, Liberia, Malawi, Mali, Mozambique, Niger, Nigeria, Senegal, Somalia, South Africa, Sudan, Swaziland, Tanzania, Togo, Zambia and Zimbabwe. Notes: Diopsis longicornis is a well-known rice stem borer, easily recognised by its large and robust built, dorsally pruinose collar, glossy black scutum, with a little pruinosity in the anterior tip, pruinose faciae anteriorly of intrascutal suture and anteriorly of scutellum, red pruinose scutellum, only some infuscation at wing apex, surstylus in lateral view a quarter circle, slightly broader apically with only microtrichia and setulae on apical section, rectangular female sternum 7 and broad cerci.

Published as part of Feijen, Hans R. & Feijen, Cobi, 2012, A new species of Diopsis L. (Diptera: Diopsidae) from South Africa and Swaziland, and brief review of African species with a large apical wing spot, pp. 125 in African Invertebrates 53 (1) on page 139, DOI: 10.5733/afin.053.0107, http://zenodo.org/record/7917621