Zombrus tricoloricorpus Long, 2018

Long, Khuat Dang, Achterberg, Cornelis Van & Hoa, Dang Thi, 2018, New record of the genus Zombrus Marshall, 1897 (Hymenoptera: Braconidae: Doryctinae), with description of three new species from Vietnam, Zootaxa 4420 (2), pp. 279-291 : 286-289

Zombrus tricoloricorpus Long , sp. n.

( Figs 22–32 )

Material. Holotype, female, ‘ Doryc.759 ’( IEBR), NW. Vietnam: Phu Tho, Tan Son, Xuan Dai , orchard, MT , 21°07’N, 103°00’E, 120m, 5.v.2009, KDLong. Paratypes: 4 females, ‘Doryc.388’ ( IEBR), NC Vietnam: Nghe An, Con Cuong, Binh Chuan, Pu Huong, 6-9.viii.2005, NT Huong; ‘Doryc.603’ ( RMNH), N. Vietnam: Ha Noi, Gia Lam, Da Ton, M[alaise] T[rap], orchard, 20°59’13’’N, 105°55’59’’E, 8m, 15-30.viii.2001, KD Long; ‘Doryc.616’ ( VNMN), NE. Vietnam: Vinh Phuc, Me Linh, MT, forest, 21°23’N, 105°42’E, 60m, 4-14.iv.2001, KD Long; ‘Doryc.674’ ( IEBR), NW. Vietnam: Phu Tho, Tan Son, Kiet Son, 21°10’N, 104°57’E, 140m, 10-15.ix.2009, KD Long, NH Thao; 1 male, ‘Doryc.603’ ( IEBR), SC. Vietnam: Quang Nam, Phuoc Son, 15°26’N, 107°53’E, 260m, 19.vii.2009, KD Long.

Holotype, female. Body length 8.7 mm; fore wing length 6.0 mm; ovipositor sheath 1.8 mm ( Fig. 22 ).

Head. Antenna with 46 segments; scapus 1.55 × as long as its maximum width (14:9); third antennal segment 2.6 × as long as its apical width (13:5), 1.2 × as long as fourth segment (13:11); palpi long, maxillary palp slightly longer than height of head (without mandible) (51:49). In dorsal view, head width 1.9 × its median length (58:31) ( Fig. 23 ); length of head 2.0 × as long as temple (22:11); frons with distinct median protuberance; occipital carina complete; temple roundly narrowed behind eyes; temple rather short in lateral view, transverse diameter of eye 1.5 × length of temple (20:13) ( Fig. 24 ); ocelli small, basal side of ocellar triangle 1.3 × as long as lateral side (4:3); POL 0.8 × as long as OD (4:8) and 0.45 × OOL (5:11) ( Fig. 23 ) (POL:OD:OOL = 4:5:11); in frontal view, eye 1.9 × as high as broad (25:13) ( Fig. 25 ); malar space height 0.6 × height of eye (16:25), 1.3 × as long as basal width of mandible (16:12); face reticulate-punctate ( Fig. 25 ) and its width 1.3 × height of eye (34:26) and 1.1 × height of face and clypeus combined (34:32); width of hypoclypeal depression 0.7 × distance from edge of depression to eye (13:19), 0.35 × as wide as face (16:45) and equal to basal width of mandible; distance between tentorial pits equal to distance from pit to eye (17:19); palpi long, length of maxillary palp 1.1 × height of head (without mandible) (54:48). Scapus 1.4 × as long as its maximum width (13:9); face largely rugose-punctate; clypeus setose, rugosepunctate; frons, vertex and temple smooth.

Mesosoma. Distinctly depressed; length twice its height (80:40); pronotum largely rugose; side of pronotum wide, largely crenulate; notauli crenulate anteriorly, rugose-striate posteriorly ( Fig. 26 ); median and lateral lobes of mesoscutum shiny, sparsely punctate ( Fig. 26 ); scutellar sulcus short, with 5 carinae ( Fig. 26 ), 0.35 × as long as scutellum (8:23); scutellum with sparse fine punctures; mesopleuron smooth; precoxal sulcus rather wide, crenulate ( Fig. 27 ); mesopleuron largely smooth; propodeum as long as first metasomal tergite, with median carina on anterior half; lateral tubercles obtuse; propodeum areolate-rugose laterally and posteriorly ( Fig. 32 ).

Wings. Fore wing 3.2 × as long as its maximum width (115:36); pterostigma 3.0 × as long as wide (45:15) ( Fig. 29 ); vein r arising before middle of pterostigma (distance from apex of pterostigma to vein SR1 1.1 × distance from vein r to base of pterostigma) (27:18); vein 1-R1 2.6 × as long as pterostigma (74:42) (r:2-SR:3-SR:SR1 =8:17:25:64) ( Fig. 29 ); second submarginal cell rather long, 1.6 × as long as its maximum width (27:16), 0.83 × as long as first subdiscal cell (27:34); vein 1-CU1 distinctly shorter than vein cu-a and 0.16 × vein 2-CU1 (6:34) ( Fig. 29 ). Hind wing 4.2 × as long as wide (96:23); vein M+CU 1.53 × as long as vein 1-M and 3.3 × vein 1r-m (49:32:15) ( Fig. 29 ).

Legs. Fore tarsus 1.4 × as long as fore tibia (60:43); inner side of fore tibia with row of 4 thick spines ( Fig. 30 ); hind coxa with long curved process ( Fig. 31 ); hind femur, tibia and basitarsus 2.55, 7.8 and 4.0 × as long as their width, respectively (51:20, 70:9 and 20:5); outer side of hind tibia with sparse and oblique setae, length of setae 1.3 × width of tibia (12:9); inner hind spur 0.6 × hind basitarsus (12:21), outer hind spur 0.5 × as long as hind basitarsus (10:21); hind tarsus 0.35 × as long as hind tibia (21:60); hind basitarsus 0.53 × second-fifth segments combined (21:39); second hind tarsus 0.62 × as long as basitarsus (13:21), 1.3 × as long as fifth segment (without pretarsus) (13:10); fourth tarsus 0.6 × as long as telotarsus (6:10). Hind coxa with long curved process and secondary tooth dorsally ( Fig. 31 ); hind tibia with sparse setae, setae 1.2 × as long as maximum width of tibia (12:10).

Metasoma. Metasoma 0.6 × as long as head and mesosoma combined (32:55); first tergite with distinct dorsope, its length 0.94 × as long as apical width (50:53) ( Fig. 28 ); first tergite as long as propodeum; setose part of ovipositor sheath 0.3 × as long as fore wing (28:92). First metasomal tergite smooth basally, with median carina on apical half, largely striate; basal area of second tergite finely striate ( Fig. 28 ); third-sixth metasomal tergites smooth.

Colour. Antenna blackish brown; head yellow; stemmaticum black; teeth black; palpi yellow; mesosoma, metasoma, fore and middle legs yellow; hind coxa black; dorsal curved process pale brown basally, ivory apically ( Fig. 31 ); hind basitarsus, second-third tarsus yellow; fourth-fifth tarsal segments brownish yellow; fore and hind wings pale brown; pterostigma and veins rather dark brown; first metasomal tergite ivory; third-fifth tergites dark brown, but ivory ventrally; sixth tergite brown basally, whitish yellow apically and laterally; seventh tergite pale yellow; ovipositor sheath dark brown.

Variation. Females: body length 6.5-9.5 mm; fore wing 5.4-6.6 mm; inner side of fore tibia with 3-5 thick spines; sixth and seventh metasomal tergites entirely ivory.

Male: body length 5.4 mm; fore wing 3.5 mm; antenna with 43 segments; inner side of fore tibia with 5 thick spines; scapus and pedicel brownish yellow; propodeum yellow, pale brown apically; second-fourth metasomal tergites brown, ivory laterally; fifth-sixth metasomal tergites entirely ivory.

Etymology. “tri” (Latin for “three”), “coloris” (Latin for “hue, tint”) and “corpus” (Latin for “body”), because of the tricoloured body.

Remarks. Zombrus tricoloricorpus sp. n. can be separated from Z. pallidiventris by the following characters: a) vein 1-CU1 of fore wing distinctly shorter than vein cu-a and 0.16 × vein 2-CU1 (vein 1-CU1 subequal to vein cu-a and 0.3 × vein 2-CU 1 in Z. pallidiventris ); b) Vein M+CU of hind wing 1.53 × vein 1-M (subequal in Z. pallidiventris ); c) Notauli transversely rugose posteriorly (almost smooth in Z. pallidiventris ); and d) Propodeum brown, fore wing dark brown entirely (propodeum entirely and fore wing basally yellow in Z. pallidiventris ).

Figures

FIGURE 22. Zombrus tricoloricorpus sp. n., holotype, female (habitus, lateral view).

FIGURES 23–32. Zombrus tricoloricorpus sp. n., holotype, female, 23. Head (dorsal view), 24. Head (lateral view), 25. Head (anterior view), 26. Mesonotum, 27. Mesopleuron, 28. Tergites 1+2+3+4, 29. Fore and hind wings, 30. Fore tibia (inner side), 31. Hind coxa, 32. Propodeum.