Illustrated key to genera and catalogue of Mymaridae (Hymenoptera) in America north of Mexico Author Huber, John T. Author Read, Jennifer D. Author Triapitsyn, Serguei V. text Zootaxa 2020 2020-05-12 4773 3 1 411 journal article 22231 10.11646/zootaxa.4773.1.1 d1ca4b58-0fd8-4bcb-8f81-12fc2c106b55 1175-5326 3821373 B1D8D67C-4FDC-477E-872F-E8BCD4D027FB Neostethynium americanum Huber , sp. n. ( Figs 659–676 ) Type material. Holotype ♀ ( CNC ), dissected under 4 coverslips on slide ( Fig. 670 ) labelled: 1. “ Holotype Neostethynium americanum Huber ♀ dorsal”. 2. “ USA : SC, Pickens Co. , Clemson , Cherry’s Crossing , 250m , 26.v- 29.vi.1987 , oak woodland along lake shore, FIT”. Paratypes . 97 ♀ , 1 ♂ . USA . GA : Clarke Co. , Athens , Oconee Forest Park, 11-12.vii.1987 , G. Gibson ( 1 ♀ , CNC ) . SC : same data as holotype ( 45 ♀ , 1 ♂ , CNC , NHMUK , UCRC , USNM ) , same data as holotype but 5.vi- 7.vii.1987 ( 42 ♀ , CNC , NHMUK , UCRC ) , same data as holotype but 8-20.vii.1987 ( 1 ♀ , CNC ) . VA: Wa rr en Co. , Shenandoah Nat. Park , Compton Gap , 800m , vii- 23.viii.1987 , MT , CNC Hym. Team ( 1 ♀ , CNC ) . Diagnosis . Neostethynium americanum is distinguished from N . stenopterum (Ogloblin) , the only other described Neostethynium species, by the following combination: scutellar seta much closer to lateral margin of scutellum than to campaniform sensillum ( Fig. 666 ) (midway between in N . stenopterum ); mandible short, but still longer than its basal width ( Fig. 662 ) (shorter in N . stenopterum , the mandible rudimentary); fu 2 and fu 6 relatively longer than wide ( Fig. 665 ) (relatively shorter in N . stenopterum ). Male with dorsal tooth an apically rounded and serrate lobe distinctly different from the 2 ventral teeth ( Fig. 672 ) (dorsal tooth same as 2 ventral teeth in N . stenopterum ). Description . Female . Body length 455–605 (n=10), 564–626 (n=3, slide mounts). Colour. Body light brown except base of ovipositor dark reddish brown or almost black; eye and ocelli reddish; scape and pedicel yellow, flagellum brown; legs except apical tarsomeres yellowish except femora and tibiae with light brown areas; wings almost uniformly hyaline ( Fig. 664 ). Head width (n=5, including holotype ) 171–186. Mandibles short but distinct, when closed their apices not meeting medially ( Fig. 660, 661 ). Antenna. Funicle segments without mps, claval segments each with 1 mps, apex of clava with short, indistinct nipple ( Fig. 665 ); length/width measurements (ratios) (n=5) are: scape 48–62/18–21 (2.37–3.21), pedicel 40–42/20 (2.00–2.10), fu 1 25–29/9–11 (2.37–3.04), fu 2 39– 42/10–12 (3.33–3.92), fu 3 33–38/10–11 (3.07–3.69), fu 4 35–36/11–12 (3.03–3.26), fu 5 30–34/10–12 (2.71–3.00), fu 6 28–33/12–14 (2.06–2.48), clava 88–104/20–25 (3.79–5.29). Wings. Fore wing with two uneven longitudinal rows of microtrichia beginning well beyond apex of venation and a few behind apex of venation; hind wing without median rows of microtrichia ( Fig. 664 ). Fore wing length (n=7) 553–586, width 64–70, length/width 8.16–8.88, longest marginal setae 126–151; hind wing length 550–579, width 17–30, longest marginal setae 82–107. Ovipositor length 154–166 (n=6), 0.71–0.80× as long as metatibia length (202–228). Male . Similar to female except for head and antenna ( Fig. 674 ). Head width 189 (n=1); mandibles large, their apices crossing each other medially, with 3 teeth, the two ventral ones pointed and equal in size, the dorsal tooth a rounded finely serrate lobe ( Figs 672, 673 ). Antenna. fl 1 and fl 2 apparently each with 2 mps, fl 3 –fl 10 apparently each with 3 or 4 mps, fl 11 apparently with 1 mps (difficult to see any of them); length/width measurements (ratios) (n=1) are: scape 62/22 (2.77), pedicel 40/23 (1.75), fl 1 30/16 (1.87), fl 2 27/16 (1.72), fl 3 33/17 (1.95), fl 4 34/19 (1.83), fl 5 34/18 (1.89), fl 6 36/20 (1.75), fl 7 34/18 (1.83), fl 8 36–18 (1.93), fl 9 36/20 (1.78), fl 10 36/16 (2.17), fl 11 37/16 (2.24). Genitalia as in Fig. 676 . Derivation of species name . The species is named after the country it occurs in ( USA , commonly referred to as America). Distribution . USA : GA, SC, VA.