IX 



BLATTIDAE 



241 



2'. The last ventral plate of the female furnished with valves. Tribe 



5. Periplanetides.^ (Fig. 119, Feriplaneta ausiralasiae.) 

 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, Blahera sp. wings.) 

 4'. Anal field of the win" with a single fold. Pronotum more or 



less 



pilose. Tribe 8. Corydiides. (Fig. 128, Corydia peti- 

 veriana. Fig. 118, Heterogamia aegyptiaca.) 

 2'. Supra- anal lamina of each sex, short, transverse, posterior margin 

 straight or rounded. 



3. Subgenital lamina of the male somewhat produced, furnished 

 with a single style. Tarsal claws with a distinct pad (except in 

 the genus Paranauphoeta). 



4. Anterior portion of the wings pointed, either the apical field of 

 the wing very much produced, or the wings twice as long as 

 the tegmina, folded in repose. Tribe 9. Oxyhaloides. [Plec- 

 topterinae Saussure.] (Fig. 129, Hypnorna amoena.) 

 4'. Anterior portion of wing, when present, rounded, with no 

 apical field. Tribe 10. Perisphaeriides. (Fig. 130, Groni- 

 phadorJiina portentosa ; Fig. 131, Pseudoglomeris fornicata.) 

 3'. Subgenital lamina of males extremely small, without styles. No 

 pad between claws. Tribe 11. Panesthiides. 

 To the above tribes another one Geoscapheusides has been recently 

 added by Tepper,^ for an extraordinary Australian Insect of fossorial habits, 

 with front legs formed somewhat like those of GryllUalpa. 



1 The "black beetle 

 Teriplaneta americana. 



Stylo-pyga orientalis, belongs to this tribe, as does also 

 2 Tr. E. Soc. S. Austral, xvii. 1893, p. 68. 



VOL. Y 



