Subfamily CAELOPYGINAE Sørensen, 1884

18. Heterampheres variabilis Mello-Leitão, 1935 b. Syntype 1Ƥ; type locality: Morro de Caxambú, Petrópolis, Rio de Janeiro State, Brazil (IBSP 51). Junior synonym of Metarthrodes nigrigranulatus Roewer, 1913 b (see Pinto-da-Rocha 2002). Not available.

19. Heterarthrodes alvimi Mello-Leitão, 1935 b. Syntype 13; type locality: Morro de Caxambu, Petrópolis, Rio de Janeiro State, Brazil (IBSP 50, Fig. 3 A). Junior synonym of Caelopygus elegans (Perty, 1833) (see Soares & Soares 1986). Available.

20. Metarthrodes pardalis Piza, 1943 a. Syntype 13; type locality: Fazenda Poço Grande, Juquiá, São Paulo State, Brazil (MZLQ A0125). Junior synonym of Ampheres leucopheus (Mello-Leitão, 1922) (see Soares 1943c). Not available.

21. Stenoprostygnus mamillatus Piza, 1940 a. Holotype 3; type locality: Alto da Serra de Paranapiacaba, São Paulo State, Brazil (ex MZLQ A0043 / IBSP 10100, Fig. 3 B). Junior synonym of Pristocnemis farinosus (Mello-Leitão, 1922) (see Soares 1943a). The original description mistakenly mentions a female holotype. However, examination of the specimen showed it is in fact a male. The author probably confused the sex due to the fact that is very slightly armed. Available.