Hypoxys curvatus sp. n.

(Figures: 4, 8E, 9E, 11A–B, 12)

Etymology. The specific epithet refers to the humeral angle curved backwards.

Holotype. BOLIVIA. Cercado: 1 ♂ Rio Cristal Mavu 50 mi NE Cochabamba, VIII– II.1944, L. Pena Collector (USNM).

Paratypes (n=5). PERU. Loreto: 1 ♂ Iquitos, Amazon River, 4.II.1927, H. Bassler Coll. (USNM) ; Huanuco Department: 1 ♂ Puente Cinchavito, 25 km S Tíngo Maria, 3400’, 11–17. IV .1987, J. E. Eger Coll. (JEE); BOLIVIA. Santa Cruz: 1 ♀ Prov. Ichilo 3–5 km SSE of Buena Vista, ± 400m; 5–12.II.2000, 17°29’96”S 63°39’13”W, W. B. Warner (JEE) ; BRAZIL. Acre: 1 ♂ Triunfo, X. 9.1977, D. Dominick Coll. (INPA) .

Measurements. Total length 13.1–14.5; total width 6.9–7.9; head length 2.9–3.2; head width 2.9–3.2; interocular distance: 1.6–1.7; length of antennal articles I: 0.6–0,9; II: 0.9–1.0; III: 1.2–1.5; IV: 2.5–2.9; V: 2.8–3.0; pronotum length 2.5–3.0; pronotum width 9.2–10.1; scutellum length 6.0–6.7; scutellum width 4.5–5,3.

Diagnosis. Antennomeres with increasing lengths progressively (I<II<III<IV≤V). Anterolateral margin of pronotum unpunctured (Fig. 11A). Humeral angles posteriorly curved, longer than eyes width (Fig. 11A). Corium reddish brown (Fig. 11A). Metasternal process with arms of anterior bifurcation receiving 2/3 of third rostral segment (Fig. 11B). Pseudosutures of abdomen with adjacent dark green spot (Fig. 11B). Male genitalia. Dorsal surface with spot restricted to coarse area of the pygophore (Fig. 4A). Dorsal rim less excavated than other species (Fig.4A); lateral expansion slightly surpassing level of posterolateral angles (Fig. 4C). Superior process of the genital cup elliptic, long and narrow (Fig. 4B). Paramere head with distal margin strongly concave; anterior and posterior lobes subrectangular, apices rounded; anterior lobe large, reaching the superior process of the genital cup; posterior lobe short and laterally curved (Fig. 4D). Proctiger moderately excavated laterally, excavation covered by short sparse setae; posterior face triangular (Fig. 4B). Inner wall with slight swollen, narrow area contiguous to posterolateral angles (Fig. 8E, black arrow). Ventral rim excavated, V-shaped; expansions little developed, rounded and curved dorsally (Fig. 4C). Female genitalia (Fig. 4E). Valvifers VIII distal and outer lateral margins almost straight and sloping; outer angle of the posterior margin forming a spine overlapping valvifers IX base (Fig. 9E, red arrow); mediolateral crest swollen globose (Fig. 9E, black arrow); mesial borders with deep U-shaped excavation. Valvulae IX exposed, with median keel, and somewhat sclerotized.

Distribution (Fig. 12). PERU: Loreto, Huanuco Department; BOLIVIA: Cercado, Santa Cruz; Brazil: Acre.

Comments. The female genitalia of H. curvatus sp. n., H. myrtacivorus sp. n., H. ocanensis sp. n., and H. triangularis show the outer angle forming a spine, but in H. curvatus sp. n. and H. ocanensis sp. n. this spine is dislocated to the middle of the valvifers IX base (in H. myrtacivorus sp. n. (Fig. 1E) and H. triangularis the outer angle spine is lateral). Hypoxys curvatus sp. n. can be separated from H. ocanensis sp. n. by mesial borders of valvifers VIII deeply excavated and U-shaped (less excavated and V-shaped in H. ocanensis sp. n.). The spinose outer angle separates these four species from the others of H. triangularis group.