Edessa (Edessa) omopalla sp. n.

(Figs. 37, 66 A–B, 73)

Etymology. The name refers to the rounded humeral angles (Gr. omos, shoulder; Gr. palla, ball).

Material examined. Holotype male. BRAZIL, Mato Grosso: Rio Xingu, 7-XI-1964, M. Gosse (IRSB).

Measurements (n= 1). Total length: 18.2; head length: 1.7; head width: 3.5; pronotum length: 3.8; pronotum width: 13.3; scutellum length: 8.9; scutellum width: 6.9; abdominal width: 11.3; length antennomeres: I: 1.0; II: 1.5; III: 2.0; IV: 3.9.

Diagnosis. Large (18.2 mm). Dorsal body surface green, densely punctured (Fig. 66 A). Ventral surface yellow with transversal brown lines on thorax and abdomen (Fig. 66 B). Antennae brown (Fig. 66 A–B). Pronotum coarse, with concolorous with the surrounding surface punctures (Fig. 66 A). Humeral angles short (1.5 times wider than long); apex with black spot restricted to the angles in dorsal view and restricted to the margin of the angles in ventral view; bent backward (Fig. 66 A–B). Scutellum with concolorous with the surrounding surface punctures; apex not reaching the end of coria (Fig. 66 A). Coria with all veins concolorous with the surrounding surface (Fig. 66 A). Connexival segments with concavities almost entirely covered by subrectangular black spots separated by a large yellow median spot (Fig. 66 A), spots extending ventrally, triangular (Fig. 66 B). Posterolateral angles of connexivum with apices black (Fig. 66 A). Ventral surface, thorax with brown lines; dark line of the propleura covering 2/3 of the width of the sclerite (Fig. 66 B). Evaporatorium concolorous with the surrounding surface, peritreme straight (Fig. 66 B). Metasternal process (Figs. 37 F; 66 B) with arms of anterior bifurcation straight and laterally well expanded, margin acuminated at apex; anterior bifurcation little excavated receiving fourth rostral segment. Legs brown (Fig. 66 B). Abdomen with spine of III segment rounded (Fig. 37 F). Intersegmental areas covered by narrow brown lines with smudged margins, reaching the lateral spots (Fig. 66 B). Pseudosutures partially covered by superficial light brown line (Fig. 66 B, dark lines are a deterioration of the exoskeleton). Median longitudinal brown band, suffused, incomplete, restricted to the segment VII (Fig. 66 B). Trichobothria one in line with spiracle and the other laterad. Male genitalia, dorsal side of the pygophore with a suffused brown area occupying 1/3 of the surface (Fig. 37 A–B). Posterolateral angles of the pygophore developed, projected laterally, apices with spots black (Fig. 37 A–B, D). Superior processes of the genital cup rectangular, thick, flattened and coarse in posterior view, continuing ventrally in a crenulate, short and high carina (Fig. 37 B, E, crenulate carina barely visible). Parameres (Fig. 37 D–E) with black margins; anterior lobe subrectangular; dorsal lobe subtriangular with curved apex; posterior lobe subrectangular. Proctiger, posterior face subelliptical (Fig. 37 D–E). Ventral rim not setose (Fig. 37 C); with expansions undeveloped and concolorous with the surrounding surface (Fig. 37 C). Female genitalia. Unknown.

Comments. See comments on E. (E.) nigroacantha sp. n. . Edessa (E.) omopalla sp. n. has the humeral angles more inclined backward than in E. (E.) nigroacantha sp. n. .

Distribution (Fig. 73). BRAZIL: Mato Grosso.