Females

1. Micropterous  ...2

- Macropterous  ...8

2. Propodeal declivity granulate, not rugose, not transversely striate; mesoscutellum humped ...Deinodryinus granulatus Olmi, Copeland & van Noort

- Propodeal declivity reticulate rugose or completely or partly transversely striate; mesoscutellum humped or flat ...3

3. Propodeal declivity completely transversely striate ... Deinodryinus richardsi (Olmi)

- Propodeal declivity reticulate rugose, not or partly transversely striate ...4

4. Metapectal-propodeal disc shiny, unsculptured ...Deinodryinus casalei (Olmi)

- Metapectal-propodeal disc reticulate rugose or granulate ...5

5. Metapectal-propodeal disc granulate ... 6

- Metapectal-propodeal disc reticulate rugose ...7

6. Head testaceous, except ocellar area darkened or black; mesosoma partly testaceous and partly black or darkened; pronotum unsculptured ...Deinodryinus capensis Olmi

- Head almost completely black; mesosoma black; pronotum granulate ...Deinodryinus nigropictus Olmi, Copeland & van Noort

7. Mesosoma completely yellow-testaceous; enlarged claw with one peg-like lamella ... Deinodryinus paulyi (Olmi)

- Mesosoma mostly black almost completely black; enlarged claw with two bristles or peg-like setae ...Deinodryinus prinslooi (Olmi)

8. Posterior surface of pronotum with sharp lateral margins ...9

- Posterior suface of pronotum with rounded lateral margins ...14

9. Body with strong constriction between prothorax and mesothorax; frons with three median longitudinal keels (frontal line + two lateral keels joining lateral ocelli to antennal toruli) ...Deinodryinus guineensis Olmi

- Body without strong constriction between prothorax and mesothorax; frons without frontal line, or with complete or incomplete frontal line, without lateral keels joining lateral ocelli to antennal toruli ...10

10. Head strongly punctate, unsculptured among punctures; occasionally anterior third of frons so strongly punctate that it seems reticulate rugose ...11

- Head completely reticulate rugose, or at most with vertex not reticulate rugose ...13

11. Protarsomere 1 much shorter than 4; distal region of protarsomere 5 very slender ...Deinodryinus ambrensis Olmi, Copeland & van Noort

- Protarsomere 1 as long as, or slightly shorter than 4; distal region of protarsomere 5 robust  ...12

12. Frontal line present in anterior half of frons ...Deinodryinus orangeanus Olmi

- Frontal line absent ...Deinodryinus piceus Olmi, Copeland & van Noort

13. Notauli reaching approximately 0.65 × length of mesoscutum ... Deinodryinus insulanus (Benoit)

- Notauli reaching approximately 0.8–0.9 × length of mesoscutum ...Deinodryinus pulcher Olmi

14. Antennomere 3 approximately twice as long as 2; protarsomere 5 bearing small lamellae, some of which longer than others ...15

- Antennomere 3 about 3 ×, or more than 3 × as long as 2 ...16

15. Mesosoma reddish-brown or dark red; protarsomere 5 bearing mostly small lamellae, some of which are much longer than others, and with apex forming obtuse angle with rest of protarsomere ...Deinodryinus madecassus (Benoit)

- Mesosoma black; protarsomere 5 bearing small lamellae, all subequal in length, and with apex forming right angle with rest of protarsomere ...Deinodryinus danielssoni Olmi

16. Protarsomere 5 bearing lamellae of approximately same length; species mostly black ... Deinodryinus benoiti Olmi

- Protarsomere 5 bearing small lamellae, some of which longer than others; species mostly testaceous-reddish ...Deinodryinus madagascariensis (Benoit)

Males

1. Metapectal-propodeal disc with strong transverse posterior keel ...2

- Metapectal-propodeal disc without transverse posterior keel ...6

2. Paramere very short, much shorter than penis ...Deinodryinus namorokensis Olmi

- Paramere very long, about as long as penis ... 3

3. Metapectal-propodeal disc very reduced; transverse posterior keel extending to anterior margin of metapectal-propodeal disc; distal part of 2r-rs&Rs vein longer than proximal part  ...Deinodryinus pulcher Olmi

- Metapectal-propodeal disc distinct and large; transverse posterior keel far from anterior margin of metapectal-propodeal disc; distal part of 2r-rs&Rs vein much shorter than proximal part  ...4

4. Propodeal declivity without longitudinal keels ...Deinodryinus sabaeus Olmi & van Harten

- Propodeal declivity with two complete longitudinal keels ...5

5. Head granulate and reticulate rugose ... Deinodryinus monticolus Olmi

- Head punctate, unsculptured among punctures ... Deinodryinus umtamvunensis Olmi

6. Paramere very short, much shorter than penis ...7

- Paramere very long, about as long as penis ...8

7. Head reticulate rugose ...Deinodryinus namorokensis Olmi

- Head punctate, unsculptured among punctures, occasionally slightly granulate ...Deinodryinus danielssoni Olmi

8. Distal part of 2r-rs&Rs vein much or slightly shorter than proximal part ...9

- Distal part of 2r-rs&Rs vein longer than, or as long as proximal part ...11

9. Clypeus yellow-whitish ...Deinodryinus musingilai Olmi, Copeland & Guglielmino

- Clypeus black or brown (rarely with anterior margin brown-testaceous) ...10

10. Proximal inner branch wrapping penis narrow ...Deinodryinus paulyi (Olmi)

- Proximal inner branch wrapping penis broad ...Deinodryinus danielssoni Olmi

11. Paramere with one small apical branch not wrapping penis ...12

- Paramere with one or two large apical branches wrapping penis ...13

12. Paramere with short and slender distal inner branch ...Deinodryinus rusticus Olmi

- Paramere with large broad inner branch located along distal half of paramere ...Deinodryinus irreptus Olmi

13. Paramere with two apical branches wrapping penis (Fig. 86B); volsellae situated between above two branches ...14

- Paramere with one apical branch wrapping penis ...15

14. Inner apical branch of paramere with apex small ...Deinodryinus harinhalai Olmi

- Inner apical branch of paramere with apex very large ...Deinodryinus sofiensis Guglielmino & Olmi

15. Apical branch wrapping penis hatchet blade shaped ...Deinodryinus madecassus (Benoit)

- Apical branch wrapping penis not hatchet blade shaped ...16

16. Head very finely punctate; inner side of paramere not sculptured by papillae ...Deinodryinus suavis Olmi

- Head reticulate rugose, or strongly punctate, with punctures large, deep and similar to areolae; inner side of paramere broadly sculptured or not by papillae ...17

17. Apical branch wrapping penis curved, very long and slender ...Deinodryinus rusticus Olmi

- Apical branch wrapping penis not curved, short and broad ...Deinodryinus steineri Olmi