5. Pronotum and elytra smooth (i.e. without peculiarity of surface other than punctuation). The radial nervure of the wing giving off several parallel branches, pectinate on the anterior margin (except in the genus Abrodiaeta). Tarsal joints without pads. Tribe 2. Phyllodromiides. [Blattinae Saussure.]
5′. Pronotum and elytra holosericeous. Radial nervure of the wings giving off irregular branches on the anterior margin (ulnar vein many-branched). Tarsal joints furnished with pads. Tribe 3. Nyctiborides.
4′. Supra-anal lamina of males more or less four-sided, with obtuse angles, of females broad, rounded, or lobed. Cerci not projecting beyond the lamina. (Tarsal joints with distinct pads.) Ulnar nervure of the wings giving off parallel branches towards the vena dividens. Tribe 4. Epilamprides.
2′. The last ventral plate of the female furnished with valves. Tribe 5. Periplanetides.[[170]] (Fig. 119, Periplaneta australasiae.)
1′. Femora unarmed beneath. (In the tribe Panesthiides the anterior femora are frequently armed with two spines.)
2. Supra-anal lamina of each sex more or less produced, posterior margin notched.
3. A distinct pad between the claws. Tribe 6. Panchlorides.
3′. No pad between the claws, or only an excessively small one.
4. Wings with a folded fan-like anal field. Pronotum smooth. Tribe 7. Blaberides. (Fig. 132, Blabera sp. wings.)
4′. Anal field of the wing with a single fold. Pronotum more or less pilose. Tribe 8. Corydiides. (Fig. 128, Corydia petiveriana. Fig. 118, Heterogamia aegyptiaca.)