Oenopiella flonensis Fernández-Aldea sp. nov. (Figs. 4 and 33, 41- 43, 49, 69; Table 1)

Etymology. The species is named for the type locality.

Type Material. Holotype male. BRAZIL: Rio Grande do Sul, São Francisco de Paula, FLONA [National Forest]/ 29 o 25'19̎S 5023'21̎W / 13-I-2007 / Schwertner, C. F. col., depositedat Museude Ciências Naturais (MCNZ), Fundação Zoobotânica do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil .

Description. Small to medium size (Table 1). Color pale orange (Fig. 4); antennal segments dark orange; legspredominantly orange. Abdominal venterdensely punctured on median third. Clypeus and mandibular plates subequal in length (Fig. 33). Antennal segment Inot attaining the apex of mandibular plates; length of segment II almost half of segment III; segment Valmost twice of segment IV. Proportion of antennal segments: I <II <III ≈IV <V. Bucculaeslightly lobate posteriorly. Rostrum attaining metacoxae. Anterior angles of pronotum with small acute projection (Fig. 4). Anterolateral margins of pronotum straight, emarginated (Fig. 33). Scutellum as long as wide, spatulate at apex, attaining level of posterior half of connexivum of segment V; disc of scutellum slightly elevated (Fig. 4).

Male Genitalia. Pygophore subquadrangular (Fig. 41), dorsal rim uniformly concave over segment X (Fig. 49). Pygophore ventral rim excavated in an open “V,” posterolateral angles triangular, slightly projecting posteriorly (Figs. 41 and 43,49); inferior layer of ventral rim projecting ventrally in a tubercle a little larger thanin O. punctaria, andwell visible inposterior view (Fig. 49). Ventral wall of pygophore with rounded depressions on each side. Posterior third of segment X with 1 + 1 slightly elevated rounded areas (Fig. 49).

Distribution. Neotropical Region province (Fig. 69): Pampa (Chacoan subregion).

Comments. O. flonensis shareswith O. punctaria and O. ventanensis the anterior angles of pronotum each with an acute projection, but in O. flonensis, it is alittle shorter; with O. unidentata the slightly elevated discof the scutellum and the spatulate apex of the scutellum; with O. ventanensis the mandibular plates subequal to clypeusin length. Thestraight anterolateralmarginsof the pronotum, and the pygophore ventral rim excavated in a deep and open “V” are unique characters of O. flonensis .