HERAEUS ALVARENGAI SP. NOV.

(FIGS 25 A, 26A, 27A–D, 28)

Diagnosis

Ocelli placed anterior to an imaginary line passing the posterior border of eyes. Labium extending to metacoxae. Evaporative area short, distance from dorsal margin of auricle to dorsal margin of evaporative area shorter than distance from dorsal margin of evaporative area to dorsal margin of metapleura. Membrane with a diffuse, apical whitish spot. Meso- and metafemur with a subapical brown band. Apex of pygophore pointed dorsally in lateral view.

This is the only species with the ocelli placed anterior to an imaginary line passing the posterior border of eyes.

Description (Fig. 25 A)

Total length 4.75.

Head: Brown, shiny, with short recumbent and scattered erect setae. Head length 1.06, width 0.82. Postocular length 0.37. Eyes not surpassing dorsal margin of head in lateral view. Ocelli placed anterior to an imaginary line passing the posterior border of eyes. Interocular width 0.42, interocellar width 0.26. Labium pale brown, with short erect setae; extending to metacoxae. Labial segment lengths: I 0.72, II 0.83, III 0.72, and IV 0.34. Antennae (right antenna with three segments, last segment darker with a diffuse pale band) pale brown, apex of basiflagellomere darker; distiflagellomere absent; with abundant, short, recumbent setae. Antennal lengths: scape 0.42, pedicel 0.93, and basiflagellomere 0.78.

Thorax: Pronotum brown, posterior lobe paler, with two irregular pale spots, each humeral angle with a pale spot; anterior and posterior lobes with short recumbent setae, with long scattered setae on anterior lobe. Pronotum pruinose, punctate, punctures larger on posterior lobe. Collar length 0.08, anterior lobe length 0.61, posterior lobe length 0.37; anterior lobe width 0.80, posterior lobe width 1.14. Pleurae brown, punctate, with short recumbent setae. Evaporative area short. Scutellum brown, with a longitudinal, dark, median stripe, pruinose, punctate, with short recumbent and sparse long erect setae. Hemelytra with short recumbent setae. Costal margin pale on proximal threequarters, corium darker distally, with a subapical whitish spot and a rounded pale spot internally (Fig. 25 A); membrane dark brown, veins paler, with a diffuse apical whitish spot. Legs: Coxae, protrochanter, and profemur brown, remainder of legs whitish, except for a darker subapical band on meso- and metafemur, tibiae darker apically (Fig. 26 A); setae short and semierect. Profemur with spines on apical two-thirds. Protibia straight.

Abdomen: Brown, with abundant short recumbent setae. Male genitalia: Pygophore (Fig. 27 A, B) rounded, anterior margin of dorsal aperture slightly rounded, apex with a dorsally directed protuberance; declivent posteriorly in lateral view. Inner projections elongate, more produced posteriorly. Parameres: Figure 27 (C, D). Aedeagus: vesica with a few spines laterally and with two sclerotized lobes bearing spines anteriorly; processus gonopori long and slender.

Distribution

Brazil (Fig. 28).

Etymology

This species is named after the late Brazilian entomologist Moacyr Alvarenga, who collected the holotype.

Type material

Holotype: ♂, BRAZIL, [Río Grande do Sul], Guanabara, Represa Rio Grande, VI-1972, M. Alvarenga (AMNH).