Therophilus annuliferus, 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 : 76-78

Therophilus annuliferus sp. n. Figs 220-228

Type material.

Holotype, ♀ (RMNH), "C. Vietnam: Thua Thien Hué, Phong Dién N.R., nr base-camp, 15 km W. Phong My, 50-60 m, 23.iii-6.iv.2001, Mal. traps 4 + 5, C. v. Achterberg & R. de Vries, RMNH". Paratypes: 2 ♀ (RMNH, IEBR), "S. Vietnam: Dak Lak, Chu Yang Sin, Krong K’Mar, Mal. traps, 800-940 m, 2-10.vi.2007, C. van Achterberg & R. de Vries, RMNH’07”.

Diagnosis.

Closely related to Therophilus nigrolineatus sp. n., but Therophilus annuliferus has the ovipositor sheath about as long as the fore wing ( Therophilus nigrolineatus : 0.6 times) and the sculpture of the second metasomal tergite only striate (nigrolineatus: finely costate).

Description.

Holotype, ♀, length of body 5.9 mm, of fore wing 4.6 mm, ovipositor sheath 4.9 mm.

Head.

Antenna incomplete, with 31 segments remaining, length of third segment 1.5 times fourth segment, length of third and fourth segments 4.0 and 2.8 times their width, respectively; length of maxillary palp 0.8 times height of head; malar space 1.1 times as long as basal width of mandible; in dorsal view length of eye 4.0 times temple; temple directly narrowed posteriorly (Fig. 227); ocelli in low triangle, POL:OD:OOL= 9:5:11; face shiny and distinctly rather finely punctate; clypeus largely smooth and weakly convex, only laterally punctulate; frons with weak medial ridge, smooth medially and densely finely punctate laterally; vertex and temple shiny and largely smooth, with sparse fine punctures.

Mesosoma.

Length of mesosoma 1.5 times its height; pronotum smooth with five carinae anteriorly, finely densely punctate dorso-posteriorly and posterior groove distinctly crenulate; area near lateral carina of mesoscutum crenulate; mesoscutum spaced finely punctate, but densely anteriorly, medio-posteriorly lobes slightly convex; notauli complete and narrowly crenulate; scutellar sulcus 0.6 times as long as dorsal face of scutellum, shallow and with 3 carinae; scutellum shiny and with sparse rather coarse punctures, subposterior crest obsolescent (Fig. 221); precoxal sulcus deep, strongly but narrowly crenulate and anteriorly absent (Fig. 222); mesopleuron below precoxal sulcus spaced finely punctate; remainder of mesopleuron shiny and largely smooth, but rather coarsely punctate below scrobe; metapleuron densely setose, spaced moderately punctate and ventrally rugose; propodeum coarsely reticulate, but smooth posteriorly (Fig. 221); propodeal spiracle rather large, 1.3 times as long as wide

Wings.

Fore wing: second submarginal cell small and petiolate (Fig. 223); vein SR1 straight; vein r short, r:3-SR+SR1 = 1:26; r-m about as long as petiolus (Fig. 223); apical half of subbasal cell sparsely setose. Hind wing: vein M+CU 0.8 times as long as vein 1-M.

Legs.

Length of hind femur, tibia and basitarsus 4.2, 7.7 and 12 times their width, respectively; hind femur densely and rather coarsely punctate but with narrow smooth interspaces and with short setae (Fig. 225); length of outer and inner spur of middle tibia 0.5 and 0.7 times middle basitarsus, respectively; outer side of middle tibia with row of 4 pegs and 2 pegs at apex; length of outer and inner spurs of hind tibia 0.3 and 0.5 times hind basitarsus, respectively; tarsal claws with large lobe.

Metasoma.

First tergite parallel-sided without distinct dorsal carinae, its length 2.3 times its apical width (Fig. 224); first and second tergites densely and moderately coarsely striate; second tergite somewhat narrowed anteriorly and with a curved transverse groove (Fig. 224); remainder of metasoma (including second suture) smooth; ovipositor sheath 1.06 times as long as fore wing.

Colour.

Black; antenna blackish-brown; mesoscutum slightly chestnut-brown posteriorly; palpi, mandible, second tergite laterally, third tergite antero-laterally and basal half of metasoma ventrally white or ivory; fore leg (but coxa, trochanter, trochantellus, femur ventrally and partly laterally and small patch of tibia brown), middle tibia dorsally (but subbasal patch and apical fifth brown), spurs and tarsus pale yellow; remainder of middle leg dark brown; hind leg black or blackish-brown and with a white basal tibial ring (Fig. 220); tegulae, apical half of metasoma ventrally, veins and pterostigma dark brown; wing membrane slightly infuscate.

Variation.

Antennal segments of female 35; vein M+CU of hind wing 0.8-0.9 times as long as vein 1-M; outer side of middle tibia with row of 4-5 pegs; length of body 5.2-5.9 mm, of fore wing 4.4-4.6 mm; length of first tergite 2.2-2.3 times as long as wide apically; length of ovipositor sheath 0.9-1.1 times fore wing.

Distribution.

S Vietnam: Dak Lak and C Vietnam: Thua Thien Hué.

Biology.

Unknown.

Etymology.

From “annulus” (Latin for “ring”), and “fero” (Latin for “carry”), because of the white basal ring of the hind tibia.