Zombrus bicoloricorpus 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 : 281-284

Zombrus bicoloricorpus Long , sp. n.

( Figs 1–9)

Material. Holotype, female, ‘ Doryc.051 ’( IEBR), NC. Vietnam: Ha Tinh, Huong Son, 18°22’N, 106°13’E, 600m, April 15-21, 1998, Malaise, AMNH, K. Long. Paratypes: 3 males, ‘Doryc.032’ ( AMNH), ‘Doryc.052’ ( RMNH), data as holotype; ‘Doryc.053’ ( IEBR), ibid. but April 22-May 1, 1998, Malaise [trap], AMNH, K. Long.

Holotype, female. Body length 9.7 mm; fore wing length 7.9 mm; ovipositor sheath 3.2 mm ( Fig. 1).

Head. Antenna with 48 segments; scapus 1.7 × as long as its maximum width (15:9); first flagellar segment 3.5 × as long as its apical width (14:4), 1.4 × as long as second segment (14:10). In dorsal view, head width 1.6 × its median length (61:38); length of head 2.4 × as long as temple (38:16); height of eye 1.4 × as long as temple (22:16) ( Fig. 2 ); in lateral view, transverse diameter of eye 0.9 × length of temple (18:20) ( Fig. 3 ); basal side of ocellar triangle as long as lateral sides; POL 0.6 × as long as OD and 0.4 × OOL (5:13) (POL:OD:OOL = 3:5:13); in lateral view, eye 1.2 × as high as broad (27:23); malar space height 0.8 × height of eye (20:25), 1.8 × as long as basal width of mandible (20:11); face width 1.5 × height of eye and 1.7 × height of face and clypeus combined (35:23:21); height of hypoclypeal depression 0.55 × distance from edge of depression to eye (11:20), 0.4 × as wide as face (15:35); and 1.4 × as wide as basal width of mandible (15:11); distance between tentorial pits as long as long distance from pit to eye; occipital carina completely absent; palpi long, length of maxillary palps 1.3 × height of head (without mandible) (56:48). Scapus with long erect setae, length of setae 1.2 × as long as width of scapus (11:9); face rugose-punctate; clypeus punctate; vertex and temple smooth; frons depressed laterally, smooth, with median carina ( Fig. 2 ).

Mesosoma. Mesosoma almost flat; length 2.3 × its height (104:46); pronotum setose; side of pronotum crenulate medially; middle lobe of mesoscutum highly elevated above pronotum; notauli deep, narrow, sparsely crenulate anteriorly, with converging carinae posteriorly ( Fig. 5 ); lateral and middle lobes of mesoscutum smooth; scutellar sulcus deep, with 5 carinae, 0.4 × as long as scutellum (5:12) ( Fig. 5 ); scutellum flat, smooth; precoxal sulcus straight, deep, narrow, crenulate ( Fig. 6 ); mesopleuron smooth; propodeum with median carina on basal half, with lateral tubercles, areolate-rugose ( Fig. 4 ).

Wings. Fore wing 3.7 × as long as its maximum width (111:30); pterostigma 3.3 × as long as wide (50:15); vein r arising before middle of pterostigma (distance from apex of pterostigma to vein SR1 1.6 × distance from vein r to base of pterostigma (80:50); marginal cell rather long ( Fig. 7 ); vein 1-R1 1.6 × as long as pterostigma (80:50); r:2- SR:3-SR:SR1 =11:18:29:50; second submarginal cell rather long, 1.85 × as long as its maximum width (37:20), 0.9 × as long as first subdiscal cell (37:43); vein 1-CU1 0.24 × 2-CU1 (10:41). Hind wing 4.8 × as long as wide (91:19); vein M+CU 1.2 × as long as vein 1-M and 2.8 × vein 1r-m (M+CU: 1-M:1r-m = 50:43:18) ( Fig. 7 ).

Legs. Fore tarsus 0.7 × as long as fore tibia (53:77); inner side of fore tibia with row of four thick spines ( Fig. 9 ); hind coxa with curved process and secondary tooth; hind femur, tibia and basitarsus 3.0, 8.2 and 3.6 × as long as their width, respectively (60:20, 90:11 and 25:7); outer side of hind tibia with straight erect setae, length of setae twice width of tibia (22:11); inner hind spur 0.4 × hind tibia (11:26); outer hind spur 0.4 × as long as hind tibia (10:26); hind tarsus 0.8 × as long as hind tibia (76:90); hind basitarsus 0.5 × second-fifth segments combined (26:50); second hind tarsal segment 0.6 × as long as basitarsus (16:26), 0.2 × as long as fifth segment (without pretarsus) (16:13). Hind coxa smooth, with long curved process and secondary tooth dorsally; hind femur coriaceous, dorsal side with straightly erected setae, length of setae as long as its maximum width; dorsal side of hind tibia with long straight erect setae, setae twice as long as maximum width of tibia.

Metasoma. Metasoma 1.2 × as long as head and mesosoma combined (102:85); first tergite with distinct dorsope, its length equal to its apical width; first tergite as long as propodeum; medially second tergite 2.1 × as long as third tergite (58:28) ( Fig. 8 ); second suture distinct; setose part of ovipositor sheath 0.4 × as long as fore wing (34:89). First metasomal tergite smooth basally, apical half with median carina and largely striate; emarginated basal area of first tergite with median carina, densely striate ( Fig. 8 ); third tergite rugose basally, smooth apically; remainder smooth.

Colour. Antenna brown; palpi yellow; head, mesosoma, metasoma and fore leg yellow; middle leg brownish yellow but tibia laterally and tarsus yellow, hind leg dark brown but fourth tarsus and telotarsus pale brown; hind coxal dorsal curved tooth brown; wing membrane brownish, some parts darker than others ( Fig. 7 ); veins brown.

Variation. Males: body length 8.0- 9.5 mm; fore wing 5.5-6.4 mm; antenna with 45-47 segments; inner side of fore tibia with 4-6 thick spines; body colour of male same as of female.

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

Remarks Zombrus bicoloricorpus sp. n. differs from Z. flavicorpus sp. n. as indicated in the key. In addition, this new species can be distinguished by having a) vein 1r-m of hind wing much shorter (0.4 ×) than vein 1-M; b) propodeum and metasoma dark brown contrasting with yellow of head and mesonotum; and fore wing entirely brown.

Zombrus bicoloricorpus sp. n. differs from Z. striolatus (Szépligeti) by the following characters: a) Distance between posterior ocelli (POL) 0.6 × as long as ocellus diameter (OD) (as long as in Z. striolatus ); b) OOL 2.6 × as long as POL (1.25 × in Z. striolatus ); c) Malar space 1.8 × basal width of mandible (slightly longer in Z. striolatus ); d) In lateral view, eye 1.5 × as long as wide (1.25 × in Z. striolatus ); and e) Fore and hind wings entirely dark brown (basal third of fore wing, basal half of hind wing yellow in Z. striolatus ).

Figures

FIGURES 2–9. Zombrus bicoloricorpus, sp. n., holotype, female, 2. Head (dorsal view), 3. Head (lateral view), 4. Propodeum, 5. Mesonotum, 6. Mesopleuron, 7. Fore and hind wings, 8. Metasomal tergites 1+2+3, 9. Fore tibia (inner side).