Centistes tubigaster Almeida & Penteado-Dias sp. nov.

(Figs. 23A–E, 25E)

Diagnosis: Vein (RS+M)a present and complete; pit on mesoscutum present; median mesonotal lobe setose anteriorly and glabrous posteriorly; notauli absent; propodeum with dorsal areola absent; ocell-ocular distance 1.25–1.60 × ocellar diameter; ovipositor sheath length 1.78–2.25 × its width; and T8 protruding distinctively beyond hypopygium.

Comments: This species is similar to C. sergeyi Aguirre, Almeida, & Shaw due to its moderately short ovipositor sheath, vein (RS+M)a complete, and having a mid-pit on the mesoscutum. However, C. tubigaster can be distinguished by the distinctive shape of its protruding metasoma apex.

Description. Female Body length: 2.18 (2.18–2.88) mm; mesosoma length 0.88 (0.88–1.16) mm. Head (Figs. 23B–C): Antenna with 21 (21–22) flagellomeres; Occipital carina complete; scape cylindrical; face setose and punctate its minimum width 1.7 (1.4–1.7) × clypeus width; face height 0.7 × its maximum width; clypeus smooth with some sparse and long setae; clypeus height 0.6 (0.6–0.7) × clypeus width; gena smooth with a few scattered setae; frons smooth and polished; vertex smooth with just a few setae; mandible overlap 0.5–0.6 × mandible length; basal width of mandible 0.4 (0.3–0.5) × its length; malar space 0.3 (0.3–0.4) × eye height; malar space 1.2 (1.2–1.6) × basal width of mandible; eye height 1.5 (1.4–1.5) × its length; ocell-ocular distance 1.3 (1.2–1.6) × ocellar diameter; temple length 1.1 (1.0–1.1) × eye length in dorsal view. Mesosoma: (Figs. 23C–D) Pronotum in lateral view mostly smooth, rugulose antero-medially, mostly glabrous, with just a few setae on borders; transverse sulcus of pronotum absent; mesonotal lobes smooth and mostly glabrous except median lobe setose anteriorly; pit on mesoscutum oval; notauli absent; mesoscutum width 1.2 (1.1–1.2) × its length; scutellar sulcus with transverse carina; scutellum sparsely setose; posterior scutellar depression scrobiculate; mesopleuron smooth and mostly glabrous, with sparse setae on its borders; precoxal sulcus rugose; metapleuron carinate-rugose with a smooth area medially; projection of metapleuron absent; propodeum with medial longitudinal carina incomplete, lateral longitudinal carina and dorsal areola absent, dorsal transverse carina complete, ventral areola oblong (or hexagonal); propodeum sparsely setose, dorsally rugulose, posteriorly rugose. Legs (Fig. 23A): Tarsal claw simple; hind coxa rugulose and setose. Wings (Fig. 25E): Vein (RS+M)a present, complete; stigma length 1.2 (1.0–1.2) × vein R1 length; vein r length 0.1 × stigma length; vein CUa 0.3 (0.3–0.4) × vein CUb. Metasoma (Figs. 23D–E): T1 lacking longitudinal carinae, costate, with a smooth area posteriorly; T1 length 1.7 (1.5–1.8) × ovipositor sheath length; ovipositor sheath with a thin border and slightly pointed; sheath length 2.1 (1.8–2.3) × its width; T8 protruding distinctively beyond hypopygium; hypopygium rounded and glabrous. Coloration (Fig. 23A): Body dark brown with yellow legs, propleura and ventral half of pronotum.

Male: Unknown.

Examined Material: Holotype female: Itamonte, MG, Brazil, PARNA de Itaitiaia, S 22° 21’ 36.9” W 44° 43’ 56”, Malaise 05, 22.xii.2011, R.F. Monteiro col. DCBU54405.

Paratypes: 7 females, same as holotype, except, DCBU54284, DCBU54285, DCBU54286, 19.vii.2011; DCBU100905, DCBU34595, 18.vi.2012, DCBU54296, 07.xi.2011, DCBU57934, 12.vi.2012 .

Etymology: The specific epithet of this species refers to the somewhat tubular shape of the apex of its metasoma.