Debilos xanthochrosatum Scherrer, 2012

Scherrer, Marcus V. & Aguiar, Alexandre P., 2012, 3469, Zootaxa 3469, pp. 1-76 : 48-49

Debilos xanthochrosatum Scherrer , sp. nov.

( Figs 115, 141)

Description. Female. Fore wing 4.05 mm. Head: Antenna with 27 flagellomeres. Clypeus very sparsely punctate, markedly convex, most prominent ventrally, CWH 1.74; MWC 0.65, MLW 1.73, MWW 0.33; malar space long, MSM 1.33; supra-antennal area with almost indistinct, median, longitudinal carina; minimum distance from eye margin to occipital carina laterally distinctly longer than mandible base.

Mesosoma . Pronotum lateral portion next to collar sub-laterally inconspicuously strigate-rugose, next to mesopleuron inconspicuously corrugated, epomia faint; notaulus moderately impressed, uniformly sculptured with mesoscutum, reaching about middle of mesoscutum; mesopleuron without distinct ridges or rugae, epicnemial carina restricted to ventral 0.7 of mesopleuron, posteriorly inconspicuously, densely corrugated; mesopleural groove moderately corrugated; sternaulus anterior half faintly corrugated; postpectal carina medially straight; metapleuron, subapical fovea shallow, subcircular; pleural carina stout; propodeum anterior area moderately long, PLL 0.86, anterior transverse carina distinct, complete, medially distinctly arched forwards, posterior area without distinct ridges or rugae, uniformly colliculate with anterior area, spiracle subrounded, SWL 1.00, propodeal apophyses long, thorn-shaped, AHD 2.23. Legs: Hind t4 posterior lobe about 0.26 × as long as anterior lobe. Fore wing vein (Rs+M)b perfectly straight, limit with crossvein 1m-cu indistinct, ramellus absent; vein Rs&1M uniformly moderately curved; crossvein 1cu-a straight, arising distinctly apicad vein Rs&1M, by about 0.3 × 1cu-a length, angle with vein M+Cu about 90 degrees; vein 2Cua about same size of crossvein 2cu-a, FWC 0.83; areolet moderately large, APH 0.83; vein 2Ma distinctly longer than vein 2Mb; vein 2Mb absent; crossvein 2m-cu with bulla short, about 0.2 × as long as vein length or shorter; vein 2Rsb sinuous. Hind wing vein 2-1A absent, HWC 1.17.

Metasoma. T1 finely coriarious, spiracle at about basal 0.7, prominent, T1LW 2.66, T1WW 3.10, T1GL 0.23; T2 moderately short, apically robust, T2T1L 0.55, thyridium subcircular, T2LW 0.77, T2WW 1.82. Ovipositor approximately straight, OST 0.55, dorsal valve with nodus absent, notch absent; ventral valve tip without distinct serrations.

Color. Head black, mesosoma, legs and metasoma yellowish (163, 128, 017). Head: Scape ventrally and clypeus yellowish; flagellomeres 6–10 mostly or entirely white; flagellomeres 12–27 lightest toward flagellum apex; mouth parts whitish (218, 216, 195), except mandible apex blackish. Mesosoma: Collar entirely, tegula, subalar ridge and propodeal apophyses white; propleuron darker than pronotum, except ventro-lateral corner lightest; pronotum dorsally, mesoscutum lateral and posterior borders, central portion and notaulus darkish to black. Legs: Fore coxa white. Wings: Hyaline. Metasoma: T1 and T2 slightly basally darkest; T1 apical 0.2 lightest; ovipositor sheath dark yellowish, except basal 0.6 ventrally whitish; ovipositor yellowish.

Male. Unknown.

Variability. Unknown.

Comments. Included in the D. trochanteratum species group (see item Species Delimitation). Of all seven species in this group, D. xanthochrosatum uniquely has the mesosoma mostly yellowish (vs. mostly orangish brown in D. curtuvenatum , or black in the other ones), the fore wing without dark spots (vs. fore wing with two dark spots), and particularly the hind wing vein 2-1A absent (vs. very short, reaching about 0.2 × the distance to wing margin in D. curtuvenatum , or moderately short to long, reaching at least 0.5 × the distance to wing margin in the other species).

Etymology. A combination of the Greek words xanthos, meaning “yellow,” and chros, meaning “skin,” in reference to the body surface mostly yellowish in this species.

Distribution. Venezuela. Tiara, Aragua (about 10°07’60”N 67°09’00”W) ( Fig. 141).

Material Examined. Holotype ♀ from VENEZUELA, Aragua, Tiara, 1250 m, V94–12, 12.IV.1994, Forest , LMasner leg. ( CNCI). In good shape, mounted on triangle point.