Therophilus crenulisulcatus, 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 : 81-82

Therophilus crenulisulcatus sp. n. Figs 247-255

Type material.

Holotype, ♀ (RMNH) "NW Vietnam: Tonkin, Hoang Lien N.R., 15 km W Sa Pa, c 1900 m, 15-21.x.1999, Malaise traps, C. v. Achterberg, RMNH’99”.

Diagnosis.

Therophilus daanyuanensis (Chen & Yang, 2006) comb. n. from Fujian (China) is similar but Therophilus daanyuanensis has no medio-posterior groove of the mesoscutum, the tegulae, the mesopleuron and the metapleuron partly orange brown, the first tergite distinctly longitudinally striate, the second tergite striate and with a wide curved transverse depression, the fore coxa and trochanter and trochantellus brownish-yellow and the middle tibia completely ivory.

Description.

Holotype, ♀, length of body 3.3 mm, of fore wing 3.1 mm, ovipositor sheath 2.5 mm.

Head.

Antenna with 27 segments, length of third segment 1.2 times fourth segment, length of third, fourth and penultimate segments 3.5, 3.0 and 1.5 times their width, respectively; length of maxillary palp 0.7 times height of head; malar space 2.3 times as long as basal width of mandible; in dorsal view length of eye 2.1 times temple; temple gradually narrowed posteriorly (Fig. 254); POL:OD:OOL = 8:5:10; face shiny and punctulate, with a small narrow groove medio-dorsally; clypeus largely smooth and weakly convex, mainly dorsally punctulate; frons with a weak medial ridge (Fig. 254), moderately concave anteriorly, smooth medially and sparsely punctulate laterally and with an indistinct triangular area in front of anterior ocellus; vertex and temple shiny, largely smooth and sparsely punctulate.

Mesosoma.

Length of mesosoma 1.3 times its height; pronotum smooth without carinae anteriorly, rather sparsely punctate dorso-posteriorly and posterior groove finely crenulate; area near lateral carina of mesoscutum crenulate; mesoscutum largely setose and smooth, only somewhat spaced punctulate, medio-po steriorly lobes flattened; notauli complete and narrowly crenulate, but somewhat widened posteriorly; scutellar sulcus 0.5 times as long as dorsal face of scutellum, moderately deep and with 3 carinae; scutellum shiny and smooth, subposterior crest obsolescent but with a rather wide and coarsely crenulate groove in front of it (Fig. 249) and medio-posterior depression narrow and finely crenulate; precoxal sulcus narrow, rather deep, narrowly crenulate and anteriorly absent (Fig. 248); mesopleuron below precoxal sulcus smooth as remainder of mesopleuron, setose (including speculum); metapleuron densely setose, dorsally rather densely and moderately punctate and ventral half reticulate-rugose; propodeum spaced reticulate, with transverse carina and dorsal areola (Fig. 249); propodeal spiracle small, 1.5 times as long as wide.

Wings.

Fore wing: second submarginal cell small and petiolate (Fig. 251); vein SR1 bent towards pterostigma; r:3-SR+SR1 = 3:43; r-m about twice as long as petiolus (Fig. 251); apical half of subbasal cell densely setose. Hind wing: vein M+CU as long as vein 1-M; setose near vein cu-a.

Legs.

Length of hind femur, tibia and basitarsus 3.6, 6.4 and 9 times their width, respectively; hind femur largely smooth, spaced punctulate and with medium-sized setae (Fig. 252); length of outer and inner spur of middle tibia both 0.45 times middle basitarsus, respectively; outer side of middle tibia with a row of 3 minute pegs and 2 minute pegs apically; length of outer and inner spurs of hind tibia 0.4 and 0.5 times hind basitarsus, respectively; tarsal claws with large lobe.

Metasoma.

First tergite widened posteriorly, sparsely and weakly striate, with dorsal carinae weakly developed, its length 1.5 times its apical width (Fig. 250); second tergite smooth, somewhat narrowed anteriorly and with a curved transverse groove (Fig. 250); remainder of metasoma (including weakly impressed second suture) smooth; ovipositor sheath 0.81 times as long as fore wing.

Colour.

Black; palpi pale yellowish; middle and hind spurs white; antenna, legs (but fore tibia brown and fore femur partly yellowish-brown, hind and middle basitarsi basally, hind tibia with a narrow basal and a wide submedial band white or ivory), tegulae, metasoma (but baso-ventrally pale brown), veins and pterostigma dark brown; wing membrane slightly infuscate.

Distribution.

NW Vietnam: Lao Cai.

Biology.

Unknown.

Etymology.

From “crenulatus” (Latin for "finely notched"), and “sulcus” (Latin for “groove”), because of the crenulate posterior groove of the pronotum.