Scolomus maculatus Araujo & Vivallo, 2018

Araujo, Rodrigo O., Vivallo, Felipe & Santos, Bernardo F., 2018, Discovery of two new Andean species of Scolomus (Townes & Townes), with a key to all known species (Hymenoptera: Ichneumonidae: Metopiinae), Zootaxa 4429 (1), pp. 189-194 : 192-193

Scolomus maculatus Araujo & Vivallo sp. nov.

( Figs 3–6 )

Diagnosis: Body covered with silvery pubescence; female supra-clypeal area with clusters of setae, seemingly bifurcate due to their aggregate nature ( Fig. 3 ). Mandible slender, sickle-shaped ( Figs 3, 5 ). Antenna and interocellar area dark brown. Head and pronotum green. Postscutellum and mesoscutum yellow, the latter presenting dark brown spots on its lateral lobes and around the scutellum. Mesosoma segments two and three dark brown. Female with hypopygium large and triangular in lateral view. Fore wing with large rhomboid areolet and very wide RS vein, resembling a petiole.

Description. Holotype female ( Figs 3, 4 ). Approximate body length: 6.50 mm. Fore wing length: 5.20 mm; antenna length: 5.00 mm; number of flagellomeres: 30; head 1.05× as wide as high (front view); distance between eye and lateral ocellus: 1.00× the diameter of lateral ocellus; frons smooth, female supra-clypeal area with clusters of setae, seemingly bifurcate due to their aggregate nature; clypeus width 1.55× its height; mandible 4.60× as long as basal width (front view), slender, with two small teeth ( Fig. 3 ); number of palpomeres 5:4; malar space 1.75× as long as mandible basal width; pronotum polished; mesopleuron punctate on upper, anterior, and lower margins; areolet rhombic, 1.00× as wide as long; hind wing with five hamuli; vein CU/1b absent; hind femur: 5.30× as long as wide; hind tibia 8.95× as long as wide; hind basitarsus 9.85× as long as wide; mesosoma generally smooth, polished and finely punctate; propodeum smooth, with isolated punctures and a distinctly delimited costula; anterior transverse carina distinct and complete; lateromedian longitudinal carina of propodeum present but incomplete; lateral longitudinal and posterior transverse carinae complete; areas basalis, petiolaris and posteroexterna discernible; T1 smooth, with isolated punctures; dorsolateral carina of T1 absent; postpetiole 2.90× as long as maximum width; glymma deep, with seemingly thin membrane between both sides; T2 3.90× as long as its height (lateral view); tergites III–VII similarly sculptured; hypopygium large and triangular in lateral view, 1.90× as long as wide; ovipositor short, needle-shaped, 5.30× as long as basal width;

Head and pronotum green. Postscutellum and mesoscutum yellow, the latter presenting dark brown spots on its lateral lobes and around the scutellum. Mesosoma segments two and three dark brown. Wing hyaline; pterostigma brown. Metasoma with T1–T4 olive green, T5 onwards dark brown. Coxae, trochanters, femora and tibiae avocado green, tarsus brown. Body covered by silver pubescence, more dense in the meso- and metapleura.

Male ( Figs 5, 6 ). Approximate body length: 5.68 mm. Fore wing length: 4.45 mm; antenna length: 4.38 mm; number of flagellomeres: 33; distance between eye and lateral ocellus 0.90× as long as diameter of lateral ocellus; clypeus 2.30× as wide as high; mandible 5.00× as long as wide (front view); malar space 1.80x as long as mandible basal width; hind femur: 4.25× as long as wide; hind tibia 7.40× as long as wide; hind basitarsus 7.70× as long as wide; dorsolateral carina of T1 absent; rounded spiracle; T2 3.80× as long as its height (lateral view); gonoforceps cylindrical; coloration as in female.

Type material: Holotype female: ONCOL 2 6 / 03 /07 ( UACh) . Paratypes. Female: Oncol 1 20/05 /07 (UACh). Male: Oncol 1 5/12 /06 (UACh). Curi – 3 19-01-07 (UACh). CURI – 3 6/06 /07 (UACh). Curi – 3 20/02 /07 (UACh). Altos de Vilches Talca , Chile x-18/25 -64 1200m C. C. Porter ( FSCA). Mesochorus \ Altos de Vilches Talca , Chile x-18/25 -64 1200m C. C. Porter (FSCA).

Type locality: CHILE: Región de los Ríos: Valdivia ( Parque Oncol ).

Distribution: CHILE: Región de los Ríos: Valdivia (Parque Oncol and Reserva Punta Curiñanco). Región del Maule: Talca (Altos de Vilches).

Etymology: The specific epithet refers to dark brown stains present on the mesoscutum of this species.

Comments: See comments under S. clypeatus sp. nov. The specimens studied showed no variation among them.

Figures

FIGURES 3–6. Scolomus maculatus new species. Figs 3: holotype female, head (frontal view); 4: holotype female, habitus; Figs 5: paratype male, head (frontal view); 6: paratype male, habitus. Scale bars (mm): Figs 3 and 5 = 0.4; Figs 4 and 6 = 2.0.