Braunsia bicolorata, van Achterberg, Cornelis & Long, Khuat Dang, 2010

van Achterberg, Cornelis & Long, Khuat Dang, 2010, Revision of the Agathidinae (Hymenoptera, Braconidae) of Vietnam, with the description of forty-two new species and three new genera, ZooKeys 54, pp. 1-184 : 25-28

Braunsia bicolorata sp. n. Figs 44-53

Type material.

Holotype, ♀ (RMNH), Aga. 119, "NE Vietnam: Hoa Binh, Mai Chau, Pa Co N.R, 1200 m, 24.iv.2002, K.D. Long". Paratypes: 1 ♂ (IEBR), Aga. 120 and 1 ♂ (RMNH), Aga. 121, same data as holotype; 1 ♀ (IEBR), Aga. 276, id., but 21.iv.2002, K.D. Long; 2 ♂ (IEBR), Aga. 216, Aga. 219 and 1 ♂ (RMNH), Aga. 220, "N.W Vietnam: Lao Cai, Sa Pa, bushes, 8.x.2004, K.D. Long".

Diagnosis.

The new species is morphologically similar to Braunsia latisocreata Bhat & Gupta, 1977, from India, but differs by having the first tergite about 3.7 times as long as its apical width (in Braunsia latisocreata 1.5 times); the second tergite about twice as long as wide apically (1.5 times); the second submarginal cell of the fore wing with a rather long (i.e. distinctly longer than vein r of fore wing) ramellus (short) and the metasoma entirely reddish yellow (black).

Description.

Holotype, ♀, length of body 9.0 mm, of fore wing 7.8 mm, ovipositor 8.0 mm.

Head.

Antennal segments 47, length of third segment 1.2 times fourth segment, length of third, fourth and penultimate segments 3.7, 3.3 and 2.0 times their width, respectively; length of maxillary palp 0.7 times height of head; in dorsal view head transverse and 1.3 times as wide as mesonotum; length of eye 2.1 times temple (Fig. 52); POL:OD:OOL = 7:4:11; antennal sockets not tubular; occipital flange sharp; malar space 1.8 times as long as basal width of mandible; face shiny with sparse fine punctures, frons and vertex smooth.

Mesosoma.

Length of mesosoma 1.5 times its height; subpronope large and deep; side of pronotum smooth; area near lateral carina of mesoscutum crenulate; lateral lobes of mesoscutum smooth; middle lobe with sparse fine punctures; notauli deep, crenulate (Fig. 46); scutellar sulcus 0.5 times as long as dorsal face of scutellum and with 3 carinae; scutellum convex anteriorly, smooth and with long setae; mesopleuron above precoxal sulcus largely smooth; mesopleuron below precoxal sulcus setose, with sparse fine punctures; precoxal sulcus wide, shallow and slightly crenulate (Fig. 45); metapleuron mainly smooth with long setae; propodeum setose, with a strong trans verse carina subbasally, rugose posteriorly; spiracle medium-sized, round, 1.8 times as long as wide.

Wings.

Fore wing: second submarginal cell pentagonal, narrow anteriorly, with rather long ramellus, 1.1 times as long as vein 2-SR (17:15) (Fig. 48); r:3-SR:SR1 = 4:3:65; 2 -SR:3-SR:r-m = 11:3:11; vein cu-a slightly antefurcal. Hind wing: vein 2-SR+M transverse; vein M+CU 0.6 times as long as 1-M (28:50); surroundings of cu-a glabrous.

Legs.

Length of hind femur, tibia and basitarsus 5.7, 10.0 and 10.6 times their width, respectively; hind coxa smooth; hind femur with short and sparse setosity (Fig. 49); outer side of apical third of middle tibia with a row of 5 pegs; outer side of apex of hind tibia with a cluster of 8 pegs; length of outer and inner spurs of middle tibia 0.4 and 0.5 times middle basitarsus, respectively; length of outer and inner spurs of hind tibia 0.3 and 0.4 times hind basitarsus.

Metasoma.

First tergite slender shiny, rugulose near apex, slightly and roundly widened apically (Fig. 47); length of first tergite 3.7 times its apical width; dorsal carinae of first tergite divergent and on three fourth of the tergite; second tergite 2.1 times as long as wide apically and with posteriorly diverging striae, on apical third of second tergite with transverse furrow; dorsal half of third tergite with striae, apical half finely granulate; remainder of metasoma smooth (Fig. 47), ovipositor sheath wide and ribbon-shaped (Fig. 50), 1.1 times as long as fore wing.

Colour.

Black; malar space ivory, clypeus and palpi pale yellow; antenna, legs and metasoma yellowish-brown, but tarsi paler than tibiae; wing membrane rather dark brown (Fig. 48).

Variation.

Female: second submarginal cell of fore wing triangular or pentagonal; vein M+CU of hind wing 0.5-0.6 times as long as 1-M; outer side of hind tibial apex with cluster of 8-10 pegs. Male: antenna with 45 or 48 segments; vein cu-a of fore wing interstitial; outer side of hind tibial apex with 7 pegs; hind coxa and first tergite apically dark brown.

Distribution.

NE Vietnam: Hoa Binh, NW Vietnam: Lao Cai.

Biology.

Unknown.

Etymology.

From “bi” (Latin for “two”), and “coloris” (Latin for "hue, tint"), because of the bicoloured body.