Aulacocentrum philippinense (Ashmead, 1904)

Pham, Thi Nhi, Long, Khuat Dang, van Achterberg, Cornelis, Cao, Thi Quynh Nga, Pham, Van Phu & Dang, Thi Hoa, 2024, Revisionary notes on the genus Aulacocentrum Brues (Hymenoptera, Braconidae, Macrocentrinae) from Vietnam, ZooKeys 1197, pp. 13-41 : 13

Aulacocentrum philippinense (Ashmead, 1904)

Figs 14 , 15 , 16

Macrocentrus philippinensis Ashmead, 1904: 145.

Material examined.

1 ♀, "Macr. 088 " (IEBR), S Vietnam: Dong Nai, Vinh Cuu, Phu Ly , TWC, forest, 11°22.612'N, 107°03.594'E, 82 m, light trap, 7.vi.2020, PT Nhi ; 2♀, " Macr. 112 ", " Macr. 113 " (IEBR), NE Vietnam: Ha Giang, Bac Me , Minh Ngoc , forest, 22°43'47.2 ”’ N, 105°12'21.3"E; 207 m, light trap, 21.vii.2019, DT Hoa ; 1♀, "Macr. 168 " (IEBR), NW Vietnam: Son La, Thuan Chau, Chieng Bom , forest, 21°21'11"N, 103°36'24"E, 1100 m, light trap, 01.v.2016, HV Tru ; 1♀, "Macr. 169 " (IEBR), NE Vietnam: Tuyen Quang, Na Hang, Trung Phin , forest, 22°30'13.68"N, 105°23'23.82"E, light trap, 18.ix.2017, HTHCT ; 1♀, "Macr. 175 " (IEBR), NE Vietnam: Ha Giang, Dong Van, Pho Bang , light trap, 12.vi-17.vi.2023, Dinh Dieu Thuy ; 1♂, "Macr. 126 " (IEBR), S Vietnam: Dong Nai, Vinh Cuu, Phu Ly, Suoi Rong , forest, 11°29'10.3"N, 107°09'58.8"E, 285 m, light trap, 12.vii.2020, PV Phu .

Description.

Male, "Macr. 126 " (IEBR), body length 8.4 mm, fore wing length 5.9 mm (Fig. 14 ).

Head. Antenna incomplete, with 31 flagellomeres remaining; first flagellomere 1.4 × second one; length of first and second flagellomeres 6.8 and 5.0 × their widths, respectively; in frontal view, width of face 0.9 × its length (Fig. 15B ); length of maxillary palp 1.7 × height of head; face densely punctate medially, sparsely punctate laterally; malar space as long as basal width of mandible; clypeus straight ventrally, sparsely, finely punctate; distance between tentorial pits 1.5 × distance from pit to eye margin; in dorsal view, width of head 2.4 × median length (Fig. 15A ); eye 8.3 × as long as temple; ocelli medium-sided, OOL: OD: POL = 8: 8: 10 (Fig. 15A ); frons, vertex, and temple shiny, smooth; stemmaticum rugose-punctate.

Mesosoma. Length of mesosoma 1.3 × its height (Fig. 15E ); pronotal trough largely crenulate medially, mostly smooth ventrally and dorsally; propleuron densely punctate (Fig. 15E ); middle lobe of mesoscutum rugulose dorsally; punctate ventrally; notauli sparsely crenulate anteriorly, narrowly fused posteriorly with median rugosity (Fig. 15D ); scutellar sulcus 2.6 × scutellum; scutellum densely punctate; mesopleuron and metapleuron largely rugose-punctate (Fig. 15E ); propodeum mostly transversely rugulose (Fig. 15F ).

Wings. Length of fore wing 3.3 × its maximum width (Fig. 15I ); length of pterostigma 3.6 × its width; fore wing vein SR1 2.1 × as long as vein 3-SR; r: 3-SR: SR1 = 10: 25: 53; cu-a inclivous (Fig. 15I ), cu-a: 1-CU1: 2-CU1 = 11: 5: 47; 2-SR: 3-SR: r-m = 16: 25: 8; second submarginal cell of fore wing narrowed distally; hind wing with vein 2-SC+R horizontal (= longitudinal); vein 1-M weakly curved basally (Fig. 15J ); cu-a: 1-M: 1r-m = 15: 10: 10; marginal cell sparsely setose.

Legs. Hind coxa elongate, densely setose latero-ventrally, but without setae dorso-apically; length of femur, tibia, and basitarsus of hind leg 8.2, 14.4, and 8.7 × their maximum widths, respectively; left hind trochantellus with four teeth in one row (Fig. 15G ); length of hind inner and outer tibial spurs 0.6 × and 0.3 × hind basitarsus, respectively; length of hind basitarsus 0.4 × hind tibia and 1.1 × second-fifth tarsal segments combined.

Metasoma. Length of metasoma 1.4 × head and mesosoma combined; first tergite nearly flat medio-basally (Fig. 15H ); length of first tergite 3.8 × its apical width; second tergite 1.1 × third tergite medially (Fig. 15H ); first metasomal tergite mostly transversely striate; second tergite with convergent striae on basal 2/3 of the tergite, parallel striation on 1/3 apical of tergite; third tergite finely striate on 2/3 basal of tergite; remaining metasomal tergites coriaceous, with long setae.

Colour. Pale-yellow; scapus largely whitish yellow, brown dorsally and outer side laterally; flagellum brown, with 11th-19th middle flagellomeres cream-white; palpi cream-white; fore leg pale yellow except coxa, trochanter and trochantellus cream-white; middle leg yellow, except coxa basally, trochanter and trochantellus paler; hind coxa yellow, hind trochanter and trochantellus dirty yellow, hind femur entirely, apical 2/3 of hind tibia blackish brown; 1/3 of hind tibia and tarsus cream-white to whitish yellow; pronotum brown, whitish yellow dorsally; mesonotum blackish brown to black; propodeum black, pale yellow basally and ventrally; metapleuron whitish yellow; wing veins brown; tegula whitish yellow; wing membrane hyaline; basal 1/3 of first metasomal tergite pale yellow, apical 2/3, and second tergite entirely black; third tergite whitish yellow basally, blackish brown apically; remainder black; ovipositor sheath brown; ovipositor yellow.

Distribution.

NE Vietnam (Ha Giang, Tuyen Quang); NW Vietnam (Son La); S Vietnam (Dong Nai) (Fig. 16 ).

Figures

Figure 14. Habitus of Aulacocentrum philippinense (Ashmead), male, dorsal, " Macr. 126 " (IEBR).

Figure 15. Aulacocentrum philippinense (Ashmead), male, " Macr. 126 " (IEBR) A head, dorsal B head, frontal C head, lateral D mesonotum E mesopleuron F propodeum, dorsal G hind coxa H first-third metasomal tergites, dorsal I fore wing J hind wing.

Figure 16. Distribution map of Aulacocentrum species.