Genus Diaparsis Förster, 1869

Type species: Porizon nutritor (Fabricius, 1804) sensu Gravenhorst, 1829 (= Porizon truncatus Gravenhorst).

Key to Afrotropical species of Diaparsis

1 Basal keel of propodeum about as long as apical area (Fig. 5). Apical area very broadly rounded anteriorly (Fig. 5). Propodeal spiracle very small, separated from pleural carina by 4.0–5.0 diameters of spiracle (Fig. 4). Ovipositor very short, conspicuously thickened at apex (Fig. 6), sheath much shorter than first tergite. Legs entirely yellow (Fig. 1). Flagellum filiform, with 26 segments in female (Fig. 3) and 24 segments in male ............................................... abstata sp. n., ♀ ♂

– Basal keel of propodeum distinctly shorter than apical area.Apical area not especially broad, pointed or narrowly rounded anteriorly. Distance between propodeal spiracle and pleural carina usually shorter. Ovipositor usually much longer, its apex usually not as above. Legs yellow to brown, hind coxa often fuscous. Flagellum sometimes clavate, usually with fewer segments..................................................2

2 First tergite white in basal 0.7, blackish in apical 0.3 (Fig. 47). Clypeus almost entirely densely and evenly punctate with only extreme lower margin impunctate. Ovipositor short and robust (Fig. 43), its sheath about 0.6× as long as first tergite .............................................................................................. mostovskii sp. n., ♀ ♂

– First tergite entirely dark brown or black. Clypeus usually sparsely punctate in its upper part and impunctate in lower part. Ovipositor sheath at least as long as first tergite......................................................................................................................3

3 Second recurrent vein interstitial (Figs 19, 26). Face, frons, mesoscutum, mesopleuron and dorsolateral area of propodeum with coarse and dense punctures (Figs 17, 20, 23); distance between punctures mostly shorter than one diameter of puncture...4

– Second recurrent vein postfurcal. Face, frons, mesoscutum, mesopleuron and dorsolateral area of propodeum often impunctate or with fine and sparse punctures ... ................................................................................................................................5

4 Metacarp almost reaching apex of fore wing (Fig. 19). Malar space short, about 0.4× as long as basal width of mandible.Anterior margin of pronotum broadly yellowish or reddish brown (Fig. 15). Flagellum of female with conspicuous median pale band (Fig. 16).............................................................................. interstitialis sp. n., ♀ ♂

– Metacarp ending far short of fore wing apex (Fig. 26). Malar space as long as basal width of mandible. Pronotum entirely black. Flagellum without pale band............ .................................................................................................... inusitata sp. n., ♀

5 Ovipositor distinctly sinuate at apex, sheath more than 3.0× as long as first tergite. Flagellum filiform and slender, with 18–20 segments. Head and mesosoma granulate, impunctate. Malar space 1.2× as long as basal width of mandible. Propodeal spiracle separated from pleural carina by 2.5× diameter of spiracle. Small species with body length 3.0– 3.4 mm ..................... ramassamy Rousse et Villemant, ♀ ♂

– Ovipositor more or less evenly upcurved, not sinuate at apex; sheath usually much shorter. Other characters varied.............................................................................6

6 Flagellum of female with 15–18 segments, filiform or narrowed towards apex (Figs 7, 13, 35, 59). Male unknown................................................................................7

– Flagellum with 19–27 segments, in female distinctly clavate at apex (Figs 31, 50, 75) (except D. voluptuosa, which has flagellum filiform but 22–23­segmented)..................................................................................................................................10

7 Basal keel of propodeum very short, about 0.1× as long as apical area (Fig. 14). Tergite 2 of metasoma more than twice as long as broad anteriorly. Foveate groove of mesopleuron very weak, virtually absent. Hind wing with nervellus strongly reclivous, slanted at about 45°. Seychelles ....................... evanescens (Morley), ♀

– Basal keel of propodeum longer, at least 0.3× as long as apical area. Tergite 2 of metasoma shorter, 1.3–2.0× as long as broad anteriorly. Foveate groove of mesopleuron well developed. Hind wing with nervellus less reclivous, at most slanted at 10°. Continental Africa.......................................................................................8

8 Metacarp very short, its distal section 0.4× as long as distance between distal end of radius and apex of fore wing (Fig. 10). Pterostigma in dorsal view conspicuously white-marked proximally and distally (Fig. 10). Malar space 1.2× as long as basal width of mandible (Fig. 9). Mesopleuron conspicuously inflated dorsally and ventroposteriorly. Mouthparts unusually long (Fig. 9) ............. aneucliformis sp. n., ♀

– Metacarp longer, its distal section 0.7–0.8× as long as distance between distal end of radius and apex of fore wing (Figs 37, 58). Pterostigma entirely brown (Fig. 37). Malar space equal to or shorter than basal width of mandible. Mesopleuron not strongly inflated. Mouth parts not unusually long...........................................9

9 Ovipositor long and slender, sheath about 2.4× as long as tergite 1 (Fig. 35). Metasoma entirely dark brown. Flagellum with 15 segments (Fig. 35). Very small, with body length 2.5 mm and fore wing length 2.15 mm ................ minuscula sp. n., ♀

– Ovipositor short and robust, sheath about as long as tergite 1 (Fig. 66). Metasoma behind tergite 1 ventrally and laterally yellow (Fig. 66). Flagellum with 17–18 segments (Fig. 59). Body length usually about 4.0 mm and fore wing length about 3.0 mm ......................................................................................... robusta sp. n., ♀

10 Flagellum yellow or brownish yellow with apical 4 or 5 flagellomeres black, strongly contrasting with other segments (Fig. 68). Head very strongly narrowed behind eyes in dorsal view (Fig. 69). Frons, mesoscutum and dorsolateral area of propodeum very densely punctate. Flagellum filiform, short, 0.7× as long as fore wing (Fig. 68); mid flagellomeres 1.2–1.3× as long as broad. Malar space short, half as long as basal width of mandible (Fig. 68). Tergite 2 of metasoma 1.37–1.39× as long as broad anteriorly (Fig. 71)....................................................... voluptuosa sp. n., ♀

– Flagellum more or less entirely black or gradually darkening towards apex. Head not so strongly narrowed behind eyes in dorsal view (Figs 29, 52, 74). Frons, mesoscutum and dorsolateral area of propodeum finely and sparsely punctate. ♀: Flagellum clavate, 0.75–1.0× as long as fore wing (Figs 28, 50, 72); mid flagellomeres 1.4–1.8× as long as broad. Malar space longer, 0.7–1.0× as long as basal width of mandible. Tergite 2 of metasoma 1.45–1.8× as long as broad anteriorly.. ..............................................................................................................................11

11 Metacarp ending far short of fore wing apex. ♀: Antenna almost as long as fore wing, flagellum very slender (Fig. 50). Tergite 2 of metasoma 1.45× as long as broad anteriorly (Fig. 56). Clypeus, in lateral view, strongly convex dorsally. Propodeum with apical area widely rounded anteriorly (Fig. 54)....... probleformis sp. n., ♀ ♂

– Metacarp almost reaching apex of fore wing (Fig. 72). ♀: Antenna about 0.75× as long as fore wing, flagellum less slender (Figs 31, 75). Tergite 2 of metasoma 1.6–1.8× as long as broad anteriorly. Clypeus, in lateral view, flat or weakly convex. Propodeum with apical area pointed or roundly pointed anteriorly (Figs 33, 76).................................................................................................................................12

12 Clypeus small, about 2.1× as long as broad (Fig. 30). Malar space 0.9–1.0× as long as basal width of mandible. Flagellum with 19 or 20 segments .............................. .................................................................................................... kolyadai sp. n., ♀

– Clypeus about 2.9× as long as broad (Fig. 73). Malar space of female 0.7–0.8× as long as basal width of mandible. Flagellum with 20–23 segments in female and 25–27 segments in male........................................................... vulgaris sp. n., ♀ ♂