Archer (1965) does not describe the male of benoiti, but this is assumed to be that species due to the less elevated abdomen (in comparison to Archer's oblique references to larvatus) and because a female recorded in the area 3 days previous appears (to me) to be benoiti.

For reference: Archer, A.F. (1965) A new species of Cyphalonotus from Central Africa (Araneae, Argiopidae). Revue de Zoologie et de Botanique Africaines 72, pp. 79-82

Dippenaar-Schoeman, A. (2014). Field Guide to the Spiders of South Africa. LAPA Publishers.