Amyras arcanus, Papp, 2004

Papp, J., 2004, Braconidae (Hymenoptera) From Mongolia Xv. Subfamily Alysiinae: Dacnusini, Acta Zoologica Academiae Scientiarum Hungaricae 50 (3), pp. 245-269 : 250-252

Amyras arcanus sp. n. f

( Figs 1–6 )

Material examined (3 f). – Female holotype and one female paratype: Mongolia, Bajan-Ölgij aimak, im Tal des Flusses Chavcalyn gol, 25 km O von Somon Cagannuur, 1850 m, 3 VII 1968, leg. Z. KASZAB (loc. nr. 1056). One female paratypes: Mongolia, Central aimak, Ulaan chodag, 16 km S von Somon Öndörschireet, 1500 m, 24 VII 1966, leg. Z. KASZAB (loc. nr. 739). – Holotype and two paratypes are deposited in the Hungarian Natural History Museum ( Department of Zoology ), Budapest, Hym. Typ. Nos 10661 (holotype) 10662–10663 (paratypes).

Holotype is in good condition. Paratype (No. 10662) is in less good condition: left antenna damaged (flagellum with 6 flagellomeres), right fore and left hind wing longitudinally creased. Paratype (No. 10663) is in fairly bad condition: right antenna damaged (flagellum with 16 flagellomeres), right fore wing distally torn, left fore wing missing.

Etymology – The species name “arcanus ” means mysterious and refers to the subtle specific features.

Description of the female holotype. – Body 3 mm long. Antenna as long as body and with 35 antennomeres. First flagellomere distinctly three times and penultimate flagellomere 1.6 times as long as broad apically ( Fig. 1 ). – Head in dorsal view ( Fig. 2 ) transverse, 1.8 times as broad between temples as long; temple somewhat swollen, i.e. head between temples somewhat broader than between eyes; temple slightly longer than eye, occiput moderately excavated. OOL three times as long as POL. Mandible clearly broadening distally, upper tooth hardly longer than middle tooth ( Fig. 3 ). Head smooth and shiny.

Mesosoma in lateral view 1.2 times as long as high. Notaulix anteriorly hardly distinct; mesoscutum, scutellum and mesopleuron polished, anterior declivous part of mesoscutum uneven. Posterior fovea of mesoscutum linear, deep. Propodeum densely rugulose. – Hind femur five times as long as broad distally ( Fig. 4 ). Hind basitarsus as long as tarsomeres 2–3 combined.

Fore wing a bit longer than body. Pterostigma ( Fig. 5 ) parallel-sided, ten times as long as wide and issuing r clearly proximally from its middle; r 1.5 times as long as width of pterostigma; 1–R1 half as long as pterostigma; 3–SR + SR1 ending before tip of wing. Vein CU1b of first subdiscal cell present, i.e. cell distally closed.

First tergite ( Fig. 6 ) clearly broadening posteriorly, somewhat longer than broad behind, pair of spiracles at middle of tergite; pair of keels short and not meeting each other; hind half of tergite rugose. Further tergites polished. Ovipositor sheath long, straight, in lateral view as long as hind tarsus.

Scape and pedicel yellow with brownish tint; flagellum brownish black, basal flagellomeres anteriorly faintly yellowish. Head and mesosoma black. Mandible, clypeus, labrum and palpi yellow. Tegula dark yellow. Legs yellow, hind coxa basally blackish, hind tibia apically and hind tarsus entirely weakly fumous. First tergite black, metasoma blackish. Tergites 2–3 with somewhat stronger, further tergites with very weak rusty suffusion. Wings hyaline, pterostigma and veins brownish yellow. ond + third and penultimate + ultimate antennomeres, 10 = hind femur, 11 = first tergite

Description of the two female paratypes. – Similar to the female holotype. Ovipositor sheath in lateral view upcurved.

Male and host unknown.

Distribution: Mongolia.

The new species, Amyras arcanus , is nearest to A. clandestina (HALIDAY, 1839) (Palaearctic Region), the two species are distinguished by subtile though well recognizable features:

1 (2) Upper tooth of mandible clearly longer than middle tooth ( Fig. 3 ). Pterostigma not parallel-sided and issuing r just proximally from its middle; r

shorter than width of pterostigma ( Fig. 8 ). Flagellomeres long, first flagellomere distinctly four times and penultimate flagellomere 2.7 times as long as broad apically ( Fig. 9 ). Hind femur 3.7 times as long as broad just distally

( Fig. 10 ). First tergite somewhat broader behind than long and fully carinated

( Fig. 11 ). Hind half of metasoma reddish yellow. f: 2.5–3 mm

A. clandestina (HALIDAY)

2 (1) Upper tooth of mandible hardly longer than middle tooth ( Fig. 3 ). Pterostigma parallel-sided and issuing r clearly proximally from its middle; r longer than width of pterostigma ( Fig. 5 ). Flagellomeres less long, first flagellomere

3.3 times and penultimate flagellomere 1.6 times as long as broad apically

( Fig. 1 ). Hind femur five times as long as broad medially ( Fig. 4 ). First tergite somewhat longer than broad behind and with a pair of short keels ( Fig. 6 ).

Hind half of metasoma black with weak rusty suffusion. f: 3 mm

A. arcanus sp. n.

Figures

Figs 1–11. 1–6. Amyras arcanus sp. n.: 1 = second + third and penultimate + ultimate antennomeres, 2 = head in dorsal view, 3 = mandible, 4 = hind femur, 5 = distal part of right fore wing, 6 = first tergite. – 7–11. Amyras clandestina (HALIDAY): 7 = mandible, 8 = distal part of right fore wing, 9 = sec-