Stultutragus nigricornis Fisher 1947, new status

Stultutragus nigricornis (Fisher, 1947), new status

(Figs 5–7)

Ommata (Eclipta) poecila var. nigricornis Fisher, 1947: 51.

Differential diagnosis. Stultutragus nigricornis (Figs 5–7) differs from S. fenestratus: pronotum with two small black maculae (sometimes fused) or without maculae; elytral yellowish areas not involved by the dark areas. In S. fenestratus the pronotum has a single large black macula, and the elytral yellowish areas are involved by the dark areas. See differential diagnosis on S. poecilus.

Integument orange. The following black: head; scape, pedicel, antennomeres III–IV; antennomere V, except extreme basal; apical three fourths of antennomeres VI–XI; two small, rounded black macula on pronotum, placed just after middle; scutellum; a large sub-triangular humeral band, that does not reach the suture; a large band about middle of elytra, from suture to the lateral margin, distinctly projected towards scutellum along suture; all apical forth of elytra; metepisternae; sub-triangular area (as a right triangle) on lateral of metasternum, starting before middle and fused in the area of metasternal suture (this area larger in females); urosternite III in males; outer lateral surface of the projection of urosternite V in males; longitudinal band on dorsal surface of the club of profemurs; apical two thirds of the club of meso- and metafemurs; dorsal surface of protibiae; meso- and metatibiae; tarsi. Urosternites I–III brownish in females; urosternites IV–V dark brown in females.

Color variation. Area between lower ocular lobes yellowish; labrum brownish; antennomere V wholly black; black maculae on pronotum fused or absent; scutellum wholly or partially orange; basal black area of the elytra reaches the suture; elytral black middle band slightly or not projected towards scutellum; middle and apical elytral black areas fused; urosternites III–V wholly black in males; urosternite IV laterally black in males.

Male (Fig. 5). Rostrum moderately long (slightly longer than half width of a lower ocular lobe). Distance between lower ocular lobes equal to 0.05 times the width of a lobe; distance between upper ocular lobes equal to twice the width of a lobe. Antennal length equal to 1.2 times the elytral length.

Pronotum coarsely, anastomosedly punctate; pilosity moderately long (mainly laterally), sparse; anterior margin preceded by narrow furrow. Lateral projections of the urosternite V, wide and elevated. Apex of metafemurs almost reaches the apex of the elytra. Metatarsomere I (Fig. 6) distinctly longer than II–III together.

Female (Fig. 7). Distance between lower ocular lobes equal to 0.8 times the width of a lobe; distance between upper ocular lobes equal to twice the width of a lobe. Antennal length equal to the elytral length.

Variation. Male: antennal length from 1.1 to 1.2 times the elytral length. Female: distance between lower ocular from 0.7 to 0.8 times the width of a lobe.

Dimensions in mm (male/female). Total length, 7.5–8.5/8.3–9.8; prothorax: length, 1.7–1.9/1.8–2,0; anterior width, 1.2–1.3/1.3–1.5; posterior width, 1.2–1.4/1.3–1.6; humeral width, 1.6–1.7/1.6–1.9; elytral length, 5.1–5.7/ 5.5/6.2.

Type, type locality. Holotype female described from Brazil (Santa Catarina, Seara,Nova Teutônia), deposited at USNM.

Geographical distribution. Brazil (Rondônia, Bahia, Distrito Federal, Goiás, São Paulo, Santa Catarina).

Material examined. BRAZIL, female, 1900, [no collector indicated] (ISNB). Rondônia: 62 km SE Ariquemes (Malaise trap), female, 7–18.XI.1995, W. J. Hanson col. (LGBC). Distrito Federal: male, 18.VIII.1984, J. Dalmacio col. (MZSP). Goiás: 1 male, 4 females, [no date and collector indicated] (MZSP). São Paulo: 2 males, XII.1940, Dirings (MZSP); male, XI.1941, Dirings (MZSP); male, XI.1950, Dirings (MZSP); Santa Catarina: male, I.1935, B. Pohl col. (MZSP); female, XI.1941, Dirings (MZSP).