Key to Paragryllus subgenera

1. Mirror of the tegmina divided by more than six veins (only P. circularis with five veins); apical area pronounced or moderately reduced. Pseudepiphallic arm mid-sized, branching about at half of its length in lateral view. Endophallic sclerite well developed............................................................................................... 2

- Mirror of the tegmina divided by five veins; apical area slightly pronounced (Fig. 3A). Pseudepiphallic arm long, branching at the apex in lateral view. Endophallic sclerite reduced (Figs. 3B–D).............................. Melloius n. subgen.

2. Small size (15.5 mm). Harp of the tegmina with 4‒5 veins (Fig. 3E). Pseudepiphallic lobes without bristles, poorly pronounced. Ectophallic fold protruding markedly in the middle of the pseudepiphallus (Figs 3F–H).............. Souzaius n. subgen.

- Medium to large size (19‒28 mm.). Harp of the tegmina with 5‒6 veins (Figs 3I, 4C). Pseudepiphallic lobes with bristles, well-pronounced and with cylindrical or conical shape in lateral view. Ectophallic fold arising slightly in the middle of the pseudepiphallus (Figs 3J–L)................................................................. Paragryllus s.s.