Alloxysta arcuata ( Kieffer, 1902 )

Ferrer-Suay, Mar, Selfa, Jesús, Tomanović, Željko, Janković, Marina, Kos, Katarina, Rakhshani, Ehsan & Pujade-Villar, Juli, 2013, Revision of Alloxysta from the north-western Balkan Peninsula with description of two new species (Hymenoptera: Figitidae: Charipinae), Acta Entomologica Musei Nationalis Pragae 53 (1), pp. 347-368 : 349-351

* Alloxysta arcuata ( Kieffer, 1902)

Material examined (14 JJ 21 ♀♀). SERBIA: Aphidius matricariae Haliday, 1834 – Brachycaudus helichrysi (Kaltenbach, 1843) on Stenactis annua, Slanci-Brdo , 9.v.2007: 5 ♀♀; Ephedrus plagiator (Nees, 1811) – Rhopalosiphum padi (Linnaeus, 1758) on Triticum aestivum, Slanci-Brdo , 29.v.2007: 1 J 1 ♀; Monoctonus ligustri van Achterberg, 1989 – Myzus ligustri (Mosley, 1841) on Ligustrum vulgare, Slanci-Brdo , 29.v.2007: 1 J; unknown primary parasitoid – Aphis craccivora Koch, 1854 on Medicago sativa, Čenta , 5.vi.2011: 1 J 1 ♀; Vodanj-Ralja, 8.vi.2012: 1 ♀; unknown primary parasitoid – Aphis fabae Scopoli, 1763 on Cirsium arvense, Umčari-Donji Kraj , 7.vi.2012: 3 JJ; Živkovac-Site 1, 8.vi.2012: 1 J 6 ♀♀. SLOVENIA: Aphidius sp. – Uroleucon sp. on Helianthus annuus , Nova Gorica, 30.ix.2008: 6 JJ 3 ♀♀; unknown aphid and primary parasitoids on Tussilago farfara , Slap- Vipava, 4.vi.2009: 1 ♀. [9 JJ and 14 ♀♀ deposited in UB, 5 JJ and 7 ♀♀ deposited in IZFBUB].

Diagnosis. Alloxysta arcuata is easily recognizable from the other Charipinae species present in the Balkan Peninsula based on its closed radial cell, carination of pronotum, and propodeal plate.

Short redescription. Head yellowish brown, mesosoma and metasoma dark brown; scape, pedicel, F1 and F2 light brown, rest of flagellomeres yellowish brown; legs yellow; veins yellowish brown. Female antennae 13-segmented; F1 and F2 smooth, thinner than remaining flagellomeres, F3–F11 club-shaped (more evident from F4), with rhinaria; F1 subequal to pedicel, F1 longer than F2, F2 subequal to F3, F3 shorter than F4 ( Fig. 19 ). Male antennae 14-segmented; F1 smooth and thinner than remaining flagellomeres, F2–F12 with rhinaria, club-shaped; F1 straight, longer than pedicel and subequal to F2; F2 slightly curved, shorter than F3, F3 shorter than F4. Pronotal carinae present, clearly visible under the pubescence ( Fig. 27 ). Propodeum covered with abundant setae; with two carinae forming a plate separated by few setae on top, with sides slightly curved ( Fig. 25 ). Forewing longer than body; radial cell closed; 2.2 times as long as wide in both male and female ( Fig. 11 ).

Distribution. Palaearctic and Neotropical Region. New record for Serbia and Slovenia.

Figures

Figs 15–24. Antenna of Alloxysta species. 15 – A. castanea (Hartig, 1841); 16 – A. macrophadna (Hartig, 1841); 17 – A. mullensis (Cameron, 1883); 18 – A. victrix (Westwood, 1833); 19 – A. arcuata (Kieffer, 1902); 20 – A. fracticornis (Thomson, 1862); 21 – A. brevis (Thomson, 1862); 22 – A. fuscicornis (Hartig, 1841); 23 – A. pleuralis (Cameron, 1879); 24 – A. salicicola Belizin, 1973.

Figs 25–28. Types of propodeum and pronotum in Alloxysta species. 25 – propodeum of A. arcuata (Kieffer, 1902); 26 – propodeum of A. victrix (Westwood, 1833); 27 – pronotum of A. arcuata; 28 – pronotum of A. brevis (Thomson, 1862).

Figs 5–14. Types of radial cell in forewing of Alloxysta species. 5 – A. castanea (Hartig, 1841); 6 – A. macrophadna (Hartig, 1841); 7 – A. pleuralis (Cameron, 1879); 8 – A. mullensis (Cameron, 1883); 9 – A. victrix (Westwood, 1833); 10 – A. fracticornis (Thomson, 1862); 11 – A. arcuata (Kieffer, 1902); 12 – A. brevis (Thomson, 1862); 13 – A. fuscicornis (Hartig, 1841); 14 – A. salicicola Belizin, 1973.