Key to oulmesiensis -group species

1 Female ..............................................................................................2

- Male................................................................................................8

2(1) Gastral petiole yellowish to orange, contrasting with propodeum and gaster (Figs 18, 42); antennal clava tapered apically into curved, finger-like process (Figs 19, 28, 43); gaster with Gt2 strongly transverse, strap-like compared to much longer Gt1 and Gt3 (Yang 1996, fig. 144); [1 metapleuron partly setose and dorsally distinctly meshlike coriaceous to shallowly reticulate (Figs 24, 41); mesepimeron at least partly setose dorsally along extreme posterior margin (Figs 24, 41); mesocoxa inserted only slightly anteriad level of base of metacoxa, the apex extending conspicuously beyond base of metacoxa; metacoxa partly green dorsally]............................................................................................. 3

- Gastral petiole dark, not contrasting with propodeum and gaster (Figs 32, 67, 78); antennal clava with slender, setose, terminal spiniform process (Figs 31, 59, 68, 83); gaster with Gt2 at least similarly as long as Gt3 and not distinctively short; metapleuron bare and dorsally shiny and smooth or at most with obscure, effaced, meshlike sculpture (Figs 32, 56, 66, 80); mesepimeron bare along posterior margin (Figs 32, 56, 66, 80); mesocoxa inserted conspicuously anteriad level of base of metacoxa, the apex extending only slightly beyond base of metacoxa; metacoxa yellowish to darker brown dorsally but without metallic luster............................................................................................... 5

3(2) Flagellum with funicle yellowish but clava dark (Fig. 28); pronotal collar posteriorly without smooth and shiny region; fore wing costal cell extensively setose within basal half; fore wing disc with distinct basal infuscate region extending width of wing separated from apical infuscate region by broad hyaline region, and dorsally uniformly setose beyond stigmal vein (Fig. 27); propodeal panels on either side of median carina mostly smooth posterior to anterior crenulate band (Yang 1996, fig. 144)................................................................................ Notanisus gracilis (Yang)

- Flagellum with funicle and clava similarly yellowish (Figs 19, 43); pronotal collar posterolaterally with obliquely angled

1. Features unknown and possibly different for N. gracilis .

smooth and shiny triangular region having transverse anterior margin so as to delineate broadly V-like convergent posterior margin of median reticulate region (Figs 23, 38); fore wing costal cell bare or ventrally with at most 3 setae within about basal third; fore wing disc with basal infuscate region comparatively small and inconspicuous (Figs 25, 44) or if more extensive then continuous with apical region posteriorly (Fig. 20), and dorsally with large bare region beyond stigmal vein (Figs 25, 45); propodeal panels extensively sculptured posteriorly on either side of median carina anterior to foramen (Figs 18, 42).......4 4(3) Petiole about as long as wide, subquadrate (Fig. 18); gaster with two lighter, more yellowish transverse bands basally, one across apical smoother part of Gt1 and Gt2, and one across apical smoother part of Gt3 (Figs 16, 17)................................................................................................ Notanisus brevipetiolus n. sp.

- Petiole conspicuously longer than wide (Fig. 42); gaster uniformly dark (Fig. 37).......... .. Notanisus longipetiolus n. sp.

5(2) Pronotum with differentiated posterolateral region comparatively small, slender, and mostly sculptured with variably effaced reticulation such that setae not distinct (Fig. 78, 80); head uniformly green with only very limited coppery luster under any angle of light (Fig. 79); pronotum (except for differentiated regions) and mesonotum mostly green (Figs 78, 80); propodeum with medial sculptured region rugulose anteriorly and minutely punctulate over at least posterior half (Fig. 82); fore wing with single infuscate region behind discal venation, though hyaline band along marginal vein somewhat wider subbasally (Fig. 84); metacoxa dorsobasally with at most 2 setae......................................... .. Notanisus yemenensis n. sp.

- Pronotum posterolaterally with large, triangular, smooth or at most finely coriaceous but shiny differentiated region bearing several conspicuous setae (Figs 33, 55, 63); head sometimes with face or at least frontovertex in dorsal view extensively reddish-violaceous (Figs 54, 64); propodeum with medial sculptured region entirely rugose to rugulose-reticulate along length of median carina (Figs 34, 58, 67); fore wing sometimes with infuscate region obviously interrupted by hyaline region behind marginal vein subbasally (Fig. 60); metacoxa dorsobasally sometimes with patch of several setae (Figs 58, 66, 67)........ 6

6(5) Fore wing with infuscate region obviously interrupted by hyaline region extending at least half distance to medial fold behind marginal vein subbasally (Fig. 60)............................................ .. Notanisus oulmesiensis (Delucchi)

- Fore wing with broad infuscate region behind discal venation (Figs 36, 69)........................................7

7(6) Metacoxa dorsobasally with patch of several setae (Figs 66, 67); head in frontal view and mesosoma extensively reddish-coppery (Figs 63, 64); scutellum punctulate-reticulate anteromesally but with larger reticulations laterally and posteriorly (Fig. 65); OOL only about 1.3× maximum diameter of posterior ocellus; head in lateral view with gena and lower face similarly strongly sculptured and colored [Arabian Peninsula].................................... Notanisus vanharteni n. sp.

- Metacoxa dorsobasally with only single seta (Figs 32, 34); head in frontal view and mesosoma mostly green to bluish-green (Figs 30–33); scutellum uniformly reticulate (Fig 34); OOL fully 2× maximum diameter of posterior ocellus; head in lateral view with gena posterior to malar sulcus much more finely sculptured and reddish-violaceous compared to reticulate, greenish lower face [USA]........................................................................ N. kansensis n. sp.

8(1) Flagellum pedicellate (Fig. 49), each funicular spindle-like and with a whorl of long brownish setae medially; metapleuron with evident sculpture and scattered setae over about dorsal half (Fig. 52); propodeal panels reticulate on either side of median carina (Fig. 51); petiole conspicuously sculptured, more or less reticulate (Fig. 51)............... ... N. longipetiolus n. sp.

- Flagellum ramose (Figs 71, 75), with six long rami having long white setae along length dorsally; metapleuron with dorsal half completely smooth, shiny and bare (Fig. 74); propodeal panels shiny and almost smooth except for subeffaced meshlike sculpture on either side of median carina (Fig. 73); petiole smooth and shiny (Fig. 73)..................................................................................................... N. vanharteni n. sp. & N. yemenensis n. sp.