Andraegoidus homoplatus (Dupont, 1838)

(Figs 3–4)

Trachyderes homoplatus Dupont, 1838: 26, pl. 200, fig. 1.

Trachyderes homoplata; Blackwelder, 1946: 591 (cat.).

Andraegoidus homoplatus homoplatus; Hüdepohl, 1985: 43, figs. 17, 18; Monné, 2005: 581 (cat.). Trachyderes humeralis Aurivillius, 1908: 7 .

Andraegoidus hassenteufeli Fuchs, 1958: 22 . Syn. nov.

Andraegoidus homoplatus hassenteufeli; Hüdepohl, 1985: 46; Monné, 2005: 581 (cat.).

Andraegoidus hassenteufeli was described from Caaguazú, Paraguay, and A. homoplatus from southern Brazil. Examination of the male holotype of Trachyderes homoplatus (fig. 3, MNHN); the photograph, kindly sent by Herbert Schmid, of the holotype of A. hassenteufeli (fig. 4); and 18 specimens from Brazil, Paraguay, Argentina, and Uruguay revealed a considerable variation in the color pattern of the elytra. The color pattern varies from black with red at the base to completely brown. Based on this variation, we propose the new synonymy.

Specimens examined. BRAZIL, “ Brazil Meridional” (central Brazil), 1 male (holotype of T. homoplatus, MNHN); Minas Gerais: Serra de Diamantina, 1300 m, 1 male, I.1903, Gounelle E. leg. (MNHN); Sertão de Diamantina (faz das melancias), 1 male, 10.XI.1902, Gounelle E. leg. (MNHN); Brasilia: Reserva Ecológica do IBGE, 1 female, II.1981, Reys L.F. leg. (MNRJ). PARAGUAY, Itapúa: Hohenau, 2 females and 2 males, III.1953 (MNRJ); 1 female and 1 male, III.1965 (MNRJ). ARGENTINA, Misiones: Loreto, 4 females and 2 males, X.1953 (MNRJ); Tucumán: 1 male (MNRJ). URUGUAY, Cerro Largo: Sierra de los Rios, 1 female, 3.III.1960, Mesa A. leg. (MNRJ).

Geographical distribution. Brazil (Paraíba, Bahía, Distrito Federal, Minas Gerais) (Hüdepohl, 1985), Paraguay (Caaguazu, Itaupaba) (Hüdepohl, 1985), Argentina (Misiones, Tucumán) and Uruguay (Cerro Largo).