i) Species-group: munona .

Five species: C. agnes sp. nov., C. alina sp. nov., C. munona, C. volta sp. nov., and C. yumiko sp. nov.

In all members of this species-group, the posterior margin of the saccus is deeply concave along with an expansion of the inner wall of the saccus, which defines the species-group (Pl. 17: Figs 5–9). In addition the group can be recognized by: i) male sternite VIII trapezoidal, distally more sclerotised, posterior margin V-shaped; ii) tegumen not extended beyond the articulation with saccus; iii) valvae notably ribbed in its inner side and tapered distally, and; iv) phallus, when everted, bears on its distal portion two dorso-lateral and two globular meso-ventral diverticula on each side.

Distribution. Coastal and mainland between Goiás in central Brazil and the extreme south of Rio Grande do Sul in southern Brazil at altitudes between about 600 and 1400 m. The widest distribution of all species-groups, occurring in the Cerrado and Atlantic Forest (Pl. 28: Fig. 2).

Key for species based on males

1) Pseudotegumen projected antero-ventrally................................................................. 2 Pseudotegumen regular................................................................................ 3

2) Emargination of posterior margin of saccus occupying 1/5 of saccus width......................... C. yumiko sp. nov. Emargination of posterior margin of saccus occupying 1/3 of saccus width............................... C. munona

3) FW postdiscal band or line not clearly marked, golden markings conspicuous........................ C. volta sp. nov. FW postdiscal band or line clearly marked, golden markings not conspicuous..................................... 4

4) Tergal lobes protruded, posterior margin of saccus V-shaped...................................... C. agnes sp. nov. Tergal lobes not protruded, posterior margin of saccus U-shaped.................................. C. alina sp. nov.