Langona mediocris

The spider is large and hairy.^[7] The male has an oval carapace that is between 3 and 3.4 cm (1.2 and 1.3 in) in length and 2.1 and 2.4 cm (0.83 and 0.94 in) in width. It is brown-black with two converging lines of white hairs running from the back of the eyes all the way to the end of the carapace. The eye field is large, covering one third of the length. The abdomen is similar in colour with single stripes of white hair down the middle and a dense area of long hairs around the edge. The underside is yellow. It is between 2.7 and 3.1 cm (1.1 and 1.2 in) long and between 2 and 2.5 cm (0.79 and 0.98 in) wide. The clypeus is low and hairy. The chelicerae are orange and toothless with a hairy protrusion a bit like a moustache on the front. The legs are orange and hairy. The spinnerets are brown and the pedipalps yellow. The palpal bulb is bulbous and has a thin and hairy appendage, or apophysis, on the tibia that is relatively long. The embolus is long and thin, and hidden within a pocket in the cymbium. Its tip looks like a spiral.^[8] The female has not been described.^[1]

Like other Lagona spiders, the chelicerae are toothless. and there is a single apophysis on the pedipalp tibia, which enables it to be distinguished from other Aelurillinae.^[9] The male closely resembles the related Langona bitumorata, but can be distinguished by the single bump on the palpal bulb.^[6]

Langona mediocris is endemic to Zimbabwe.^[1] The holotype was found in 1990 in Manicaland.^[6]