Colastomion cephonodes Long, 2021

Oanh, Nguyen Thi, Dzuong, Nguyen Van, Long, Khuat Dang, Lam, Pham Van, Nhi, Pham Thi & Hoa, Dang Thi, 2021, Six new braconid wasps of the genus Colastomion Baker, 1917 (Hymenoptera: Braconidae: Rogadinae) from Vietnam, Zootaxa 5040 (2), pp. 215-237 : 221-224

Colastomion cephonodes Long & PVLam, sp. n.

Figs 13 – 26

Material examined. Holotype, ♀ ( IEBR), “Rog. 765 ”, S Vietnam: Gia Lai, Ia Grai, 14.0787°N, 107.8939°E, coffee plantation, ex. caterpillar of coffee hawkmoth Cephonodes hylas (Linnaeus), 15.iv.2012, PVLam . Paratypes, 12 ♀ ( IEBR), “Rog. 759 ”, “Rog. 760 ”, “Rog. 761 ”, “Rog. 762 ”, “Rog. 763 ”, “Rog. 764 ”, “Rog. 766 ”, “Rog. 767 ”, “Rog. 768 ”, “Rog. 1187 ”, “Rog. 1188 ”, “Rog. 1189 ”, data as holotype ; paratypes, 4 ♂ ( IEBR), “Rog. 769 ”, “Rog. 770 ”, “Rog. 1190 ”, “Rog. 1191 ”, data as holotype .

Morphology. Holotype, ♀, body length 7.7 mm, fore wing length 5.6 mm, antenna 6.2 mm ( Fig. 13 ).

Head. Antenna with 53 flagellomeres; middle antennomeres 2.0 × longer than wide (6: 3); 3 rd antennomere 1.2 × fourth (11: 9); 3 rd segment of maxillary palp 3.3 × longer than maximally wide (10: 3); 5 th segment 1.1 × length of 6 th (9: 8); width of face 1.1 × length of face and clypeus combined (22: 20); width of face: height of eye = 1.8: 2.2; malar space 0.45 × as long as basal width of mandible (5: 11); basal width of mandible 0.7 × as long as hypoclypeal depression (11: 15); malar suture absent; distance between tentorial pits 3.3 × distance between pit and eye (10: 3) ( Fig. 19 ); in dorsal view, height of eye 3.1 × as long as temple (22: 7); in lateral view, width of eye 2.4 × as long as temple (19: 8) ( Fig. 18 ); ocelli high, POL: OD: OOL = 4: 7: 4 ( Fig. 14 ); distance between front and hind ocelli as long as OOL; occipital carina broadly obliterated mediodorsally ( Fig. 14 ); face almost smooth medially, lateral area transversely rugulose ( Fig. 19 ); frons with curved striae; vertex and temple smooth.

Mesosoma. Length of mesosoma 1.35 × as long as high (81: 60) ( Fig. 16 ); propleuron sparsely crenulate; precoxal sulcus shallowly depressed; mesopleuron shiny and largely smooth; metapleuron with sparse fine punctures; mesoscutum distinctly protruding above pronotum, largely smooth with sparse fine punctures; notauli narrow and deep anteriorly, with a deep median depression posteriorly between notauli ( Fig. 15 ); scutellar sulcus 0.7 × as long as scutellum (8: 12) with one carina; scutellum smooth; propodeum rugose without trace of areola.

Fore wing. Pterostigma 4.0 × as long as wide (52: 13); vein M+CU1 weakly curved subapically; vein 1- SR+M slightly curved ( Fig. 21 ); vein r arising far before middle of pterostigma; vein cu-a postfurcal, reclivious; 2-CU1 5.4 × longer than 1-CU1 (27: 5) ( Fig. 21 ); SR1: 3-SR: r = 48: 33: 9; vein 2-SR 5.0 × 2-SR+M (15: 3); 1-CU1: cu-a: 2-CU1: 3-CU1 = 5: 5: 27: 6; basal length of second submarginal cell 2.6 × as long as its apical width (42: 16).

Hind wing. Vein M+CU subequal to vein 1-M (34: 33); M+CU: 1-M: 1r-m = 34: 33: 17; vein 2-SC+ R thickened, subquadrate ( Fig. 22 ); vein SR almost straitght.

Legs. Hind coxa shiny smooth; femur: tibia: basitarsus: tarsus 1–5 = 64: 80: 46: 104, length of hind femur, tibia and basitarsus 5.3, 8.9 and 11.5 × as long as their width respectively; middle tibial spur curved and setose basally; apex of hind tibia with comb of specialized setae at inner side.

Metasoma. First tergite 1.45 × as long as apical width (45: 31) ( Fig. 20 ); 2 nd metasomal tergite as long as wide basally; medial length of 2 nd tergite 0.9 × third (27: 30), with indistinct midbasal triangular area ( Fig. 20 ); 2 nd metasomal tergite as long as wide apically (27: 27), with basal midlongitudinal carina becoming rugosity posteriorly; length of 3 rd metasomal tergite 0.8 × its basal width (30: 38) ( Fig. 20 ); first metasomal tergite rugulose, with basal short carina; 2 nd tergite longitudinally striate with approximately 9 striae lateral to midlongitudinal, rugo-punctate extremely at apex; 3 rd tergite densely striate; fourth tergite rugo-striate basally, rugo-punctate extremely at apex; fifth and sixth tergites sparsely finely punctate; hypopygium slightly convex with sparsely setose; ovipositor sheath obliquely setose; ovipositor smooth apically, with 3 teeth ventro-apically ( Fig. 17 ).

Coloration. Body yellow; palpi pale yellow; stemmaticum black; vein membrane hyaline.

Variation. Paratypes (female), antenna with 46 – 53 flagellomeres; first tergite 1.25–1.4 × as long as apical width; medial length of metasomal second tergite 1.1–1.2 × as long as third tergite medially; body length 5.6 – 7.6 mm; fore wing length 4.6–6.8 mm.

Male. (Paratype): Body length 6.5 mm, fore wing length 4.7 mm, antenna 7.1 mm; antenna with 43–50 flagellomeres; third segment of maxillary palp 1.6 × longer than maximally wide (14: 9); 5 th segment 1.5 × length of 6 th (12: 8) ( Fig. 24 ); width of face: height of eye = 1.9: 2.7; fore wing vein 2-SR 5.3 × 2-SR+M (16: 3); basal length of second submarginal cell 2.35 × as long as its apical width (33: 14); hind wing vein 2-SC+R subquadrate ( Fig. 25 ); second-third metasomal tergites rugo-striate ( Fig. 26 ).

Etymology. Named after the generic name of its host, Cephonodes hylas (Linnaeus) ( Sphingidae ). (Named because of its parasitism of Cephonodes hylas (Linnaeus) ( Sphingidae ).

Host and biology. All specimens of the new species Colastomion cephonodes Long & PVLam sp. n., was reared from one caterpillar of the coffee hawkmoth Cephonodes hylas (Linnaeus, 1771) ( Lepidoptera , Sphingidae ) ( Fig. 85 ), a total of 28 individuals were gregariously emerging from a single mummified host larva with sex ratio males: female = 1: 3 (7: 21). In Tay Nguyen plateau (Central Highlands of Vietnam) in coffee plantation, the peak of caterpillars of the coffee hawkmoth is observed in late February to early March, sometimes the population of host larvae is lasted throughout March to April, and parasitic wasps occurred from late April to early May (end dry season in the Southern Vietnam).

Distribution. S Vietnam (Central Highlands: Gia Lai).

Figures

FIGURE 85. Cephonodes hylas moth, host of Colastomion cephonodes, sp. n. (habitus)

FIGURES 13–22. Colastomion cephonodes Long & PVLam, sp. n., female, holotype. 13 Habitus 14 Head (dorsal view) 15 Mesonotum (dorsal view) 16 Mesopleuron 17 Hypopygium (lateral view) 18 Head (lateral view) 19 Head (frontal view) 20 First-fourth metasomal tergites 21 Fore wing 22 Hind wing.

FIGURES 23–26. Colastomion cephonodes Long & PVLam, sp. n., male, paratype. 23 Head (lateral view) 24 Maxillary palp 25 Hind wing 26 First-fourth metasomal tergites.