Chorebus (Stiphrocera) orisellus, Papp, 2005

Papp, J., 2005, Braconidae (Hymenoptera) From Mongolia, Xvi. Subfamilies Gnamptodontinae, Brachistinae, Euphorinae, Alysiinae, Acta Zoologica Academiae Scientiarum Hungaricae 51 (3), pp. 221-251 : 239-240

Chorebus (Stiphrocera) orisellus sp. n. m

( Figs 53–59 )

Material examined (1 m). – Male holotype: Mongolia, Central aimak, cca 30 km O von Somon

Nalajch, 1350, 14 Juni 1966, leg. Z. KASZAB (loc. no. 523). Holotype is deposited in the Hungarian Natural History Museum (Department of Zoology),

Budapest, Hym. Typ. No. 10725. Holotype is in good condition: right fore tibia + tarsus missing. Etymology. – The species name “orisellus ” indicates its close relationship to Ch. anasellus ,

i.e. its oriental (“ori”) ally.

Description of the male holotype. –Body 1.3 mm long. Antenna as long as body and with 19 antennomeres. First flagellomere clearly twice, middle ones 2.5 times and penultimate flagellomere 2.6 times as long as broad. – Head in dorsal view ( Fig. 53 ) transverse, 1.9 times as broad as long, eye and temple equal in length, temple rounded, occiput feebly excavated; head 1.5 times as broad as mesoscutum between tegulae. Eye in lateral view 1.85 times as high as wide, temple beyond eye somewhat wider than eye, ventrally narrowing ( Fig. 54 , see arrows). Inner margin of eye parallel. Mandible as long as broad between upper and lower teeth, upper tooth moderately produced ( Fig. 55 ). Tentorial pit small, ending far from eye. Occiput bare, i.e. with scattered hairs, temple with somewhat more hairs. Head polished.

Mesosoma in lateral view 1.3 times as long as high, polished. Pronotum bare, medially with pronope. Precoxal suture missing. Mesoscutum hairy, pair of lateral lobes anteriorly hairy. Propodeum rugulose-subrugulose, pubescent; metapleuron pubescent with rosette. – Hind femur five times as long as broad distally ( Fig. 56 ). Hind tibia and tarsus equal in length.

Fore wing about one-fifth longer than body. Pterostigma ( Fig. 57 ) cuneiform, ten times as long as wide, issuing r near from its base, r a bit longer than width of pterostigma; 3–SR + SR1 bent, SR1 almost straight and ending before tip of wing; 1–R1 0.55 times as long as pterostigma. Subdiscal cell short, somewhat widening distally, closed distally albeit veins CU1b less pigmented ( Fig. 58 ).

First tergite ( Fig. 59 ) evenly broadening posteriorly, 1.4 times as long as broad behind, pair of spiracles small and at middle of tergite, densely rugulose, anteriorly hairy and its posterior half rather pubescent. Further tergites polished. Second tergite somewhat longer than third tergite, border between them faintly distinct.

Antenna and body black. Mandible dark rusty, palpi brown. Tegula blackish, parategula dark brown. Coxae black, otherwise legs brownish black. Wings hyaline, pterostigma greyish brownish, veins light brown.

Female and host unknown.

Distribution: Mongolia.

The new species, Chorebus (Stiphrocera) orisellus , is nearest to Ch. (S.) anasellus (STELFOX) considering their dark coloured body and legs, antenna with low number of antennomeres and short marginal cell; the two species are distinguished by the features keyed:

1 (2) First tergite more broadening posteriorly, i.e. just longer than broad behind

( Fig. 60 ). Hind femur four times as long as broad distally ( Fig. 61 ). Pterostigma wide and parallel-sided, 6.3 times as long as wide ( Fig. 62 ). Mandible dull reddish. m: (1.5–) 2–2.2 mm. – Ireland, Turkey ( BEYARSLAN & INANC

2000), Azerbaidjan, Russia (European part, Transbaykalia)

Ch. (S.) anasellus ( STELFOX, 1952)

2 (1) First tergite less broadening posteriorly, i.e. 1.4 times as long as broad behind ( Fig. 59 ). Hind femur five times as long as distally ( Fig. 56 ). Pterostigma cuneiform, ten times as long as wide ( Fig. 57 ). Mandible brownish yellow. m: 1.3 mm. – Mongolia Ch. (S.) orisellus sp. n.

part of right fore wing

Figures

Figs 53–62. 53–59. Chorebus (Stiphrocera) orisellus sp. n.: 53 = head in dorsal view, 54 = head in lateral view, 55 = mandible, 56 = hind femur, 57 = distal part of right fore wing, 58 = subdiscal cell of fore wing, 59 = tergites 1–3 with detail of the sculpture of first tergite. – 60–62. Ch. (S.) anasellus (STELFOX): 60 = tergites 1–3 with detail of the sculpture of first tergite, 61 = hind femur, 62 = distal