Key to the species of Janeirona Distant

1 Distal half of antennomeres I surpassing the mandibular plates (Figs. 4, A; 23, A).................................. 2

- Distal half of antennomeres I not surpassing the mandibular plates (Figs. 17, A; 31, A).............................. 4

2 Antennomeres I not dilated (Fig. 23, A); pygophore posterolateral angles with acute apices directed to each other (Fig. 24, A, E)................................................................................................. 3

- Antennomeres I dilated (Fig. 4, A); pygophore posterolateral angles with rounded apices not directed to each other (Fig. 5, A, E)........................................................................ Janeirona insignis Distant, 1911

3 Antennomeres II clavate, with less than half the length of antennomeres I (Fig. 23, A); ventral body color predominantly dark brown (Fig. 22, B, C)....................................................... Janeirona costalimai (Pirán, 1962)

- Antennomeres II subcylindric, with more than half the length of antennomeres I (Fig. 27, A); ventral body color predominantly ocher (Fig. 26, B)................................................. Janeirona aurea Sampaio & Campos sp. nov.

4 Labium attaining urosternite III (Fig. 34, B)................................................................ 5

- Labium not attaining urosternite III (Fig. 10, B)............................................................. 7

5 Posterior margin of eyes forming an angle of less than 45º with the longitudinal body axis (Fig. 31, A)................. 6

- Posterior margin of eyes forming an angle of about 45º with the longitudinal body axis (Fig. 35, A)................................................................................... Janeirona roellae Sampaio & Campos sp. nov.

6 Legs yellowish, contrastingly lighter than the ventral abdomen (Fig. 30, B); inner margins of mandibular plates concave anterior to clypeus (Fig. 31, A)........................................... Janeirona flavipes Sampaio & Campos sp. nov.

- Legs the same color of the ventral abdomen (Fig. 39, B); inner margins of mandibular plates straight anterior to clypeus (Fig. 40, A)......................................................... Janeirona stenosa Sampaio & Campos sp. nov.

7 Body length greater than 14 mm; antennomeres I surpassing the apex of mandibular plates (Fig. 17, A); pygophore posterolateral angles with truncated apices (Fig. 48, A, E)...................................... Janeirona bergi (Kormilev, 1956)

- Body length less than 14 mm; antennomeres I not surpassing the apex of mandibular plates (Fig. 11, B); pygophore posterolateral angles with rounded apices (Fig. 12, A, E)...................................... Janeirona vianai (Kormilev, 1956)