BLATTIDAE 24 1 



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

 5. Periplaneiides.i (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. Blabbrides. (Fig. 132, Bta&era sp. wings.) 

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

 less pilose. Tribe 8. Cortdiides. (Fig. 128, Gorydia 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 Parancmplweta). 



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, Eypnorna amoena.) 

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

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

 phadorhina portentosa ; Fig. 131, Pmidoglovieris fornicata.) 

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

 pad between claws. Tribe 11. Panesthiides. 

 To the above tribes another one — Geosoapheusides — has been recently 

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

 with front legs formed somewhat like those of Gryllotalpa. 



1 The "black beetle," SHlopyga orientalis, belongs to this tribe, as does also 

 Periplaneta a/mericana. 



= Tr. R. Soc. S. Austral, xvii. 1893, p. 68. 



VOL. V 



