Zoologische Mededelingen, 82 (June 2008)K.D. Long; C. van Achterberg: One new genus and seven new species of Rogadinae (Hymenoptera: Braconidae) from Vietnam

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Descriptions

Vietorogas gen. nov.

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(figs 1-10)

Type species: Vietorogas bachma Long, spec. nov.

Etymology.— “Viet” (from Vietnam) and “Rogas” (from the generic name Rogas Nees, 1818). Gender: masculine.

Diagnosis.— Antenna of female with distinct spine apically (fig. 3); apex of scapus oblique, in lateral view longer dorsally than ventrally; scapus longer than apically wide; occipital carina present but absent dorsally; eyes glabrous and distinctly emarginate; tentorial pits medium-sized, distance between tentorial pits more than distance from pits to eyes; face with two smaller pits above tentorial pits and connected by a faint groove; eyes more than twice as long as wide (in anterior view); frons with a prominent mid-longitudinal carina; area between antennal sockets with transverse rugae; in lateral view eye 4.7 times wider than length of temple; ocelli rather large (fig. 1); antescutal depression distinct; prepectal carina complete; precoxal sulcus rugose; notauli deep in anterior half, but fading medially, fused posteriorly resulting in a large flat rugose area (fig. 5); median carina of metanotum absent; propodeum with long sparse setae and anteriorly with strong median carina, posteriorly with small areola, largely granulate or finely reticulate-rugose; posterior lateral corners of propodeum rather deeply sunken, without granules and rugosities (fig. 8); propodeal spiracle behind middle of propodeum; vein cu-a of fore wing vertical and far postfurcal; second submarginal cell long, distinctly narrowed distally; vein 1-M of fore wing curved basally; vein m-cu of fore wing short and subparallel with anterior half of vein 1-M (fig. 4); vein 1-SR of fore wing vertical or nearly so; hind wing broad; marginal cell of hind wing parallel-sided apically, slightly curved submedially; vein m-cu of hind wing absent; vein M+CU of hind wing more than twice as long as vein 1-M, the latter a little shorter or equal to vein 1r-m; apex of hind tibia without comb of specialized setae at inner side; hind tibial inner and outer spurs equal, straight and with short setae (fig. 7); fifth and following metasomal tergites retracted under fourth tergite (fig. 10); second-fourth tergites with weak lateral crease (fig. 9); first tergite with dorsope, dorsal carinae complete on first and second tergites, strong, largely united; dorsal carina on third tergite present on basal two third of tergite; posterior margin of fourth metasomal tergite protruding (figs 9, 10); in lateral view, posterior margin of fourth metasomal tergite with well-developed sublateral semicircular emargination (fig. 10); hypopygium of female small, in lateral view straight ventrally and medio-ventrally without keel and apically acute; ovipositor sheath short, widened and truncate apically (fig. 9).

Notes.— The new genus differs from similar genera of the Rogadini by the well-developed sub-lateral semicircular emargination of the fourth metasomal tergite (fig. 10), the retracted apical tergites of the metasoma, the short vein m-cu of the fore wing (subparallel with anterior half of vein 1-M; fig. 4) and the vertical vein 1-SR of the fore wing.

Vietorogas bachma Long, spec. nov.

(figs 1-10)

Material.— Holotype, ♀ (IEBR) “Rog. 512, Vietnam: Thua Thien-Hue, Bach Ma National Park, 600 m, forest, 16.v.2007, K.D. Long”. Paratype: 1 ♀ (RMNH), topotypic, but 19.v.2007.

Holotype, ♀, length of body 4.3 mm, length of fore wing 3.5 mm, antenna 4.5 mm.

Head.— Antennae with 40 segments, slightly longer than body; middle segments longer than wide (5:3), penultimate antennal segment equal to apical segment; apical segment with distinct spine (fig. 3); width of face equal to length of face and clypeus combined (fig. 2); malar space 1.4 times as long as mandible width, mandible width 1.25 times as long as hypoclypeal depression; malar suture absent; distance between tentorial pits 1.25 times distance between pits and eyes (fig. 2); eyes more than 2.1 times as high as wide (19:9; in anterior view); in lateral view width of eye 4.7 times as long as temple; POL:OD:OOL = 3:4:3, distance between front and hind ocelli equal to OOL; frons with a short longitudinal carina; face rugose with long sparse setae (fig. 2); area between antennal sockets with transverse rugosities (fig. 2); vertex and temple rugose.

Mesosoma.— Length of mesosoma 1.5 times its height; pronotum strongly carinate anteriorly (fig. 6); mesoscutum completely rugose; pronotal trough with distinct carinae (fig. 5); precoxal sulcus shallow and faintly rugose; mesopleuron finely punctate medially; mesoscutum rugose; scutellar sulcus wide and deep with strong median carinae; lateral lobes of mesoscutum posteriorly and scutellum finely granulate; propodeum largely granulate (paratype also with fine rugosities); posterior lateral corners deeply sunken without granules and rugosities; propodeal spiracle small (fig. 8).

Wings.— Fore wing: pterostigma 3.2 times as long as wide; vein 1-SR of fore wing short (fig. 4); r:2-SR:3-SR:SR1= 7:9:16:34; vein r arising submedially from pterostigma; vein cu-a short and vertical, vein 1-CU1 long; 1-CU1:cu-a:2-CU1:3-CU1 = 11:4:13:7; 1-CU1 distinctly longer than m-cu (11:9; fig. 4); second submarginal cell distinctly narrowed distally, its length about 2.3 times as long as its basal width and 3.6 times as long as its apical width (18:8:5; fig. 4). Hind wing: vein M+CU:1-M: 1r-m = 25:12:12.

Legs.— Hind coxa finely granulate and densely setose; length of fore femur:tibia: tarsus:basitarsus = 31:35:33:12; length of hind femur:tibia:tarsus:basitarsus = 40:55:52:20; inner hind tibial spur 0.45 times as long as basitarsus (fig. 7).

Metasoma.— Second-fourth tergites with weak lateral crease (fig. 9); first tergites with dorsope; first tergite 0.7 times as long as apical width; medial length of second tergite slightly less than third (21:20); second suture crenulate; third and second tergites strongly longitudinally striate with rugulosity between striae; fourth tergite areolate-rugose; fifth and following tergites retracted under fourth tergite (fig. 10); hypopygium of female medium-sized with sparse setae; ovipositor sheath short, widened and truncate apically, length of ovipositor sheath 0.6 times as long as hind basitarsus (fig. 9).

Colour.— Yellow; antenna dark brown; palpi whitish yellow; stemmaticum black; pronotum, metanotum, large apical triangle of first tergite and large medio-longitudinal area of second tergite pale yellow; propodeum, ovipositor sheath and stemmaticum dark brown; all coxae whitish yellow; hind tarsus light brown; lateral corners of second tergite, basally large corners of third tergite and large medio-basal area of fourth tergite black or dark brown; wing membrane yellowish with dark brown veins and pterostigma.

Vietorogas abditivus Long & van Achterberg, spec. nov.

(figs 11-17)

Material.— Holotype, ♀ (IEBR) “Rog. 406, Vietnam: Tay Ninh, Lo Go-Xa Mat National Park, bushes, 4.xi.2003, K.D. Long”.

Holotype, ♀, length of body 4.3 mm, length of fore wing 3.7 mm.

Head.— Antenna with 34+ segments, middle segments twice longer than wide; width of face slightly longer than length of face and clypeus combined (fig. 14); malar space 1.4 times as long as mandible width, width of mandible 1.7 times as long as hypoclypeal depression; malar suture absent; distance between tentorial pits 1.2 times distance between pits and eyes (fig. 14); eyes about 1.9 times as high as wide (in anterior view); in lateral view width of eye 2.4 times as long as temple; POL:OD:OOL = 3:4:3, distance between front and hind ocelli equal to OOL (fig. 13); frons with a rather long prominent longitudinal carina; face rugose; area between antennal sockets with transverse rugosities (fig. 14); vertex and temple rugose.

Mesosoma.— Length of mesosoma 1.4 times its height; pronotum strongly carinate anteriorly and posteriorly (fig. 17); mesoscutum rugose anteriorly, with coarse rugosities posteriorly (fig. 15); pronotal trough with distinct carinae anteriorly and posteriorly (fig. 17); scutellar sulcus wide and deep with strong median carinae; precoxal sulcus shallow and completely transversely rugose (fig. 16); lateral lobes of mesoscutum and scutellum finely granulate; metapleuron completely rugose; propodeum reticulate rugose with strong median carina united anteriorly and fading posteriorly; postero-lateral corners deeply sunken, without granules and rugosities (fig. 12); propodeal spiracle medium-sized (fig. 12).

Wings.— Fore wing: pterostigma 3.2 times as long as wide (fig. 11); vein 1-SR of fore wing comparatively long (fig. 11); vein r:2-SR:3-SR:SR1 = 5:10:18:34; vein r arising just before middle of pterostigma; vein cu-a short and vertical; vein 1-CU1 long; 1-CU1:cu-a:2-CU1:3-CU1 = 11:3:14:6; second submarginal cell distinctly narrowed distally, its length more than 2.7 times as long as basal width and 4.5 times as long as its apical width (27:10:6); vein 1-CU1 about as long as vein m-cu (fig. 11). Hind wing: vein M+CU:1-M:1r-m = 26:14:15.

Legs.— Hind coxa finely granulate and densely setose; length of fore femur:tibia: tarsus:basitarsus = 31:35:33:37; length of hind femur:tibia:tarsus:basitarsus = 33:43:45:23; inner hind tibial spur 0.3 times as long as basitarsus.

Metasoma.— First tergite with dorsope, areolate-rugose, about 0.7 times as long as its apical width (23:34); medially second tergite somewhat longer than third tergite (25:23); second suture crenulate; second-fourth tergites with a more developed lateral crease than in V. bachma; third and second tergites strongly longitudinally striate with rugulae between striae; fourth tergite areolate-rugose; fifth and following tergites retracted under fourth tergite; hypopygium medium-sized with sparse setae; ovipositor sheath short, widened and apically truncate; ovipositor sheath 0.4 times as long as hind basitarsus (10:23).

Colour.— Reddish yellow; antenna pale yellow basally and brown apically; palpi whitish yellow; stemmaticum black; pronotum, metanotum, propodeum reddish yellow; large apical triangle of first tergite, basal half of third and fourth tergites, ovipositor sheath and stemmaticum dark brown; lateral area of second tergite pale brown; all coxae and apical half of third and fourth tergites yellow; hind tarsus light brown; wing membrane yellowish with dark brown veins; pterostigma brown, but basal third pale yellow.

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