Key to the genus Jocquestus gen. nov.

1 Males (♂ of J. harrisi sp. nov. unknown)................................................................... 2

- Females (♀ of J. griswoldi sp. nov. unknown)............................................................... 8

2 Embolus originating retrolaterally on tegulum (Figs 39, 66)..................... J. schenkeli (Lessert, 1923) comb. nov.

- Embolus originating prolaterally on tegulum (e.g. Fig. 42)..................................................... 3

3 RPA extending the entire length of palpal tibia or just past it; palpal tibia without RTA (e.g. Fig. 54), or only very weakly developed (Fig. 43); conductor absent..................................................................... 4

- RPA clearly extending less than the length of palpal tibia; palpal tibia with strongly developed, distinct RTA (e.g. Fig. 49); narrow conductor present, positioned behind embolus........................................................... 6

4 Embolus with almost perpendicular bend at 2/3 its length; RPA almost parallel to axis of palpal tibia in ventral view (Fig. 5 3)..................................................................................... J. incurvus sp. nov. - Embolus nearly straight or only slightly curved, without perpendicular bend; RPA clearly bending away from axis of palpal tibia in ventral view.................................................................................... 5

5 Cymbium with four strong spines at distal end; embolus with slightly swollen tip (Fig. 42)............ J. capensis sp. nov.

- Cymbium without any strong spines at distal end; embolus gradually narrowing to a sharp point (Fig. 62)..................................................................................... J. roeweri (Lawrence, 1938) comb. nov.

6 Embolus curving in a broad arc, with tip at retrolateral margin of cymbium (Fig. 48); RTA subtriangular in lateral view (Fig. 49)................................................................................. J. griswoldi sp. nov.

- Embolus with characteristic loops medially and near tip (Fig. 57); RTA rounded, with sharp dorsal tooth in retrolateral view (Fig. 58).............................................................................. J. obliquus sp. nov.

7 Epigyne with large, broadly arched recurved epigynal ridges at approximately one-quarter the length of the epigyne; ST I distinctly bilobed, situated away from epigastric furrow (Fig. 55)................................... J. incurvus sp. nov.

- Epigyne with oblique or C-shaped epigynal ridges in posterior half of epigyne, sometimes extending as far forward as midpoint; ST I usually oval, rarely bilobed, situated close to epigastric furrow......................................... 8

8 Epigynal ridges C-shaped, anterior margin approximately at midpoint of epigyne (Fig. 50); ST II narrow, close to midline of epigyne, with narrow ducts leading to oval posterior ST I (Fig. 51)................................ J. harrisi sp. nov.

- Epigynal ridges oblique, with most of their length in posterior half of epigyne; epigynal ridges narrower than anterior width of ST II, ducts and shape of ST I variable..................................................................... 9

9 Anterior of epigyne with distinct darkened arch-shaped margins (Figs 44–46); endemic to south-western South Africa........................................................................................... J. capensis sp. nov.

- Anterior of epigyne lacking darkened margins; distributed in eastern half or central parts of Africa, south of the equator... 10

10 ST I positioned approximately 1/3 the distance between mesal and lateral edges of epigynal ridges; ST II comma-shaped, with rounded head anteriorly and distinct mesal space separating their basal section (Fig. 59); abdomen lacking dorsal scutum (Fig. 16).................................................................................. J. obliquus sp. nov.

- ST I positioned at mesal edge of epigynal ridges; ST II touching along most of their mesal margins, without a large space between them (Figs 64, 69); abdomen with oval dorsal scutum covering most of dorsum (Figs 18, 20)................. 11

11 ST I with two distinctive lobes in external view (Fig. 64); ST II distinctly enlarged anteriorly, forming rounded head; mesal margins of ST II not touching along their entire mesal surface, separated by narrow ovoid space posteriorly (Fig. 64)........................................................................... J. roeweri (Lawrence, 1938) comb. nov.

- ST I with single round lobe in external view (Fig. 68); ST II large, almost parallel-sided laterally, touching along their entire mesal margin (Fig. 68).................................................. J. schenkeli (Lessert, 1923) comb. nov.