Tibraca exigua Fernandes & Grazia, 1998

(Figs 109–112)

Tibraca exigua Fernandes & Grazia, 1998: 1057 .

Material studied. Camaquã: 1♂, 08.V.1991, H. Moreira leg. (UFRG) . Pelotas: 1♀, VI.1991, Marcolin leg. (UFRG); 1♂, 10.VI.1990, M. N. Miranda leg. (UFRG); 1♂, 20.II.1991, P. Welzel leg. (UFRG); 1♂, V.1991, R. Zepra leg. (UFRG); 1♀, 28.IV.1991, R. Von Laer leg. (UFRG); 1♂, III.1991, Silveira leg. (UFRG); 1♂, 27.V.1994, J. T. Zanusso leg. (UFRG); VI.1990, 1♂, Costa leg. (UFRG); 27.IV.1993, 1♂, O. Maguelly leg. (MCNZ); 1♂, VI.1990, Marques leg. (UFRG); 1♂, V.1990, Schallens leg. (UFRG); 1♂, IV.1991, Monteiro leg. (UFRG); 1♂, 26.X.1994, I. M. Silva leg. (UFRG); 1♀, 17.III.1991, H. Gastal leg. (UFRG); 1♂, 17.V.1991, D. Chapon leg. (MECB) . São Francisco de Paula: 1♀, 17–19.XII.2005, V. C. Matesco leg. (UFRG) .

Diagnostic features. Body dorsal and ventral surfaces dark castaneous (Fig. 109, 111). Head longer than wide. Mandibular plates shorter than clypeus, rounded apically (Fig. 110). Clypeus robust and raised above the mandibular plates. Antennomere 2 smaller than the first (Fig. 110, red arrow). Anterolateral margins of pronotum impunctate or rarely punctate at the lateral portion (Fig. 110). Internal angles of cicatrices of pronotum with pale yellow callosity. Humeral angles slightly developed (Fig. 110).Apex of radial vein of corium with pale yellow callosity. Connexivum castaneous with margin light castaneous and a small black spot at the apex (Fig. 109). Body length: 9.00–12.00 mm (Fernandes & Grazia 1998).

Recorded host plants. Rice (Fernandes & Grazia 1998).

Distribution in Rio Grande do Sul. Camaquã, Canguçu, Capão do Leão, Pelotas and São Francisco de Paula (Fig. 112).

Comments. This species is similar to T. limbativentris, being differentiated by its darker color and smaller body size.