Monoctonus luteus Čkrkić, Petrović & Tomanović, 2019

Čkrkić, Jelisaveta, Petrović, Andjeljko, Kocić, Korana, Kavallieratos, Nickolas G., Hebert, Paul D. N. & Tomanović, Željko, 2019, Review of the world Monoctonina Mackauer 1961 (Hymenoptera, Braconidae, Aphidiinae): key for their identification and descriptions of five new species, Zootaxa 4691 (4), pp. 359-385 : 368

Monoctonus luteus Čkrkić, Petrović & Tomanović , sp. n.

Holotype. Female. Canada, British Columbia, Kootenay National Park, Kootenay Crossing , 10 VI 2014, coll. P. Langan, Malaise trap . Holotype slide mounted and deposited in CNC . Paratypes: Alberta, Banff National Park, Baker Creek picnic area , 16 VI 2012, 1 male; 19 VI 2012, 1 male. Paratypes slide mounted and deposited in FBUB. ( Fig. 5 a–h)

Diagnosis. This species morphologically resembles M. caricis based on fore wing venation and labial palps with 2 palpomeres, but has a distinctly elongated F1 (F1 length/width ratio: 5.6 in M. luteus , and 3.6 in M. caricis ), and only moderately widened ovipositor sheath (length/width ratio 4.2 in M. luteus , and 3 in M. caricis ).

Female. Head ( Fig. 5a ). Eyes oval, medium sized, sparsely setose. Malar space equal to 0.14 of longitudinal eye diameter. Tentorial index 0.12. Clypeus oval with 5 setae. Maxillary palps with four palpomeres, labial palps with two palpomeres. Antenna with 16 antennomeres, filiform, setae on flagellomeres semierect, subequal to flagellomere diameter ( Fig. 5b ). Flagellomere 1 (F1) 5.6× as long as wide, without longitudinal placodes. F2 4.2× as long as wide, without longitudinal placodes ( Fig. 5c ). F3, F4 and F5 with 1, 2 and 2 longitudinal placodes, respectively. F1 1.3× longer than F2.

Mesosoma. Mesoscutum without notaulices, dorsal surface smooth, scarcely setose in lower half ( Fig. 5d ). Head width/mesoscutum width ratio 1.3. Propodeum areolated, with narrow central pentagonal areola and slightly irregular oblique carinae ( Fig. 5e ).

Fore wing ( Fig. 5h ). Wing length 2.4 mm, width 1 mm. Stigma narrow, 7.2× as long as wide and 3.3× as long as distal abscissa of R1. Vein m-cu visible in first third, second third colourless, last third effaced. 2RS absent. Veins r and 3RS distinct.

Metasoma. Petiole 2× as long as wide at spiracles. Dorsal disc of petiole moderately rugose, with one irregular carina medially and with 4–5 long setae on each side ( Fig. 5f ). Ovipositor sheath only slightly widened ventrally. Ovipositor sheath length/width ratio 4.2 ( Fig. 5g ).

Colour. Mostly yellow. Head brown, eyes black. Scapus, pedicel and basal third of F1 yellow, remainder of antenna brown. Mesonotum brown, propodeum and legs yellow. Wings hyaline with brown venation. Petiole, rest of metasoma and ovipositor sheath yellow. Body length 2.6 mm.

Male. Head. Eyes oval, medium sized, sparsely setose. Malar space equal to 0.3 of longitudinal eye diameter. Tentorial index 0.3. Clypeus oval with 9–10 setae. Maxillary palps with four palpomeres, labial palps with two palpomeres. Antenna with 18 antennomeres, filiform, setae on flagellomeres semierect, subequal to flagellomere diameter. Flagellomere 1 (F1) 2.4× as long as wide, with 6 longitudinal placodes. F2 2.3× as long as wide, with 5–6 longitudinal placodes. F3, F4 and F5 with 5–6, 6–7 and 5–6 longitudinal placodes, respectively. F1 length equal to F2.

Mesosoma. Mesoscutum without notaulices, scarcely setose in lower half. Head width/mesoscutum width ratio 1. Propodeum areolated, with narrow central pentagonal areola and slightly irregular oblique carinae.

Fore wing. Wing length 2.1 mm, width 0.9 mm. Stigma narrow, 7.1× as long as wide and 2.7× as long as distal abscissa of R1. Vein m-cu visible in first third, second third colourless, last third effaced. 2RS absent. Veins r and 3RS distinct.

Metasoma. Petiole 1.8× as long as wide at spiracles. Dorsal disc of petiole moderately rugose, with one irregular carina medially and with 4–5 long setae on each side.

Colour. Head and antenna brown, mouthparts light brown. Mesonotum brown, propodeum and legs light brown. Wings hyaline with brown venation. Petiole and rest of metasoma brown. Body length 2.1 mm.

Host: unknown.

Distribution. Western Canada.

Etymology: The name of this species refers to its yellow color.

Figures

FIGURE 5. Monoctonus luteus sp.n., female. a—head; b—antenna; c—F1 and F2; d—mesoscutum; e—propodeum; f—petiole; g—ovipositor; h—fore wing.