Nasocomptus obyberaba, sp. nov.

(Figs 30–47)

Types. Holotype male: “ BRASIL, Rondônia, Ouro Preto do Oeste, XI. 1983 Becker, Roppa & Silva” (MNRJ). Paratype female; same locality and data (MZSP). Paratype male: “ Pérou, Chanchamayo; Museum Paris, ex. Coll. R. Oberthur” (MNHN).

Description. Length (rostrum excluded) and humeral width (mm): holotype male (12.9; 6.3); paratype male (13.6; 6.5); paratype female (14.1; 6.7).

Color: integument black, dark reddish brown on antennae and tarsomeres, clothed dorsally and ventrally by flat rounded scales, most of which metallic green with bluish or golden iridescence, and a variable number of irregular, small clusters of rounded dull scales over pronotum and dorsal area of elytra; on ventral side, a few elongate erect scales intermixed among the rounded ones, chiefly on ventrites; stiff setae present on legs. Prothorax and elytra with granules, without metallic scales; granules of pronotum irregular, those of elytra rounded and irregularly aligned on interstriae.

Prothorax transverse, about 1.3 times wider than long; anterior and posterior regions constricted, sides rounded, greatest width near anterior third; post­medial carina narrow and bare, not reaching the base. Sides and disc with irregular granules, some coalescent, each granule bearing a single erect setiform scale; dark mat scales forming three irregular spots, a pair near posterior third of disc, and a third spot on middle of base. Vibrissae of postocular lobes curved, yellowish (Figs 31 and 45).

Scutellum (Fig. 34) very prominent, about 1.3 times as long as wide; black, with a few sparse, greenish, elongate oval scales.

Elytra 3.5 times longer than pronotum, 1.50–1.55 times as long as wide (holotype 1.55X; paratype male 1.51X; paratype female 1.54X); dark dull scales forming irregular spots on humeral region and near elytral declivity; additional smaller spots may be present on disc; elytral striae partly obliterated by rounded scales.

Ventrite V (Fig. 46, male) sub­trapezoidal, about 2.2 times wider than long, apex truncate rounded, with a median, setulose, V­shaped depression; Ventrite V (Fig. 47, female) sub­triangular, about 1.6 times wider than long, apex pointed and weakly convex, with scales and short setae present.

Male genitalia (Figs 42 and 43). Median lobe about 0.4 times as long as median struts; lateral margins converging from base to near distal fourth, then strongly constricted and forming acute apex (Fig. 42); weakly curved in lateral view, but dorsal margin strongly convex.

Female genitalia (Figs 40 and 41). Coxites compressed laterally, each one about 3 times as long as high (lateral view), apex rounded and setulose, stylus ventral and preapical, very small and inconspicuous. Spermatheca U­shaped.

Etymology: obyberaba, from the Tupi language, oby = green or blue and beraba = shining, bright; in reference to the bright green/blue color of the species.

Type locality: BRAZIL, Rondônia, Ouro Preto do Oeste.

Geographic distribution: Nasocomptus obyberaba is known from Peru (Junin) and Brazil (Rondonia).

Remarks: Some other insects present a similar distribution, being represented in the Oriental Andean slopes (Chanchamayo Valley 11° 05’ S and 75° 32’ W) and the Amazonian Region (as Ouro Preto do Oeste 10° 40’ S and 62° 18’ W). Among the weevils (Vanin, 1986), one could mention Prosicoderus ibis (Kirsch, 1874), and among the megachilid bees (Urban, 2004), Anthodioctes indescriptus (Dalla Torre, 1890) . It should be stressed that according to Hueck (1972) the vegetation of the Oriental Andean slopes shows affinities with the Amazonian Forest.