FAM. BLATTID/E 5 



presence or absence of spines on the lower borders of the femora, the shape of the supra-anal lamina 

 and of the sub-genital lamina in the female, the presence or absence of arolia between the tarsal claws, 

 and the structure of the wings. 



KEY TO THE SUB-FAMILIES 



i. Femora spitted beneath. 



2. Last ventral segment of the female large, without valves. 



3 . Supra-anal lamina of both sexes usually tranvcrse, narrow. Wings 

 when present with an apical field, ulnar vein simple or bifurcate. 



Posterior femora usually sparsely armed with spines beneath . . i. Subfam. Ectobin^e. 

 3'. Supra-anal lamina of both sexes more or less produced, triangular or 

 emarginate. Wings when present with or without triangular api- 

 cal field, ulnar vein ramose. Posterior femora usually strongly 

 spined beneath. 

 4. Supra-anal lamina of both sexes triangular, entire. Cerci project- 

 ing considerably beyond this lamina. 

 5. Pronotum and tegmina smooth. The radial vein of the wings 

 usually giving off to the anterior margin several parallel 



costal veins. Tarsi with no pulvilli 2. Subfam. Phyllodromin^e. 



5'. Pronotum and tegmina covered with a silky pile. The radial 

 vein of the wings giving off to the anterior margin irregu- 

 lar costal veins. Tarsi provided with pulvilli . ... 3. Subfam. NvcTiBORiNffi. 

 4'. Supra-anal lamina of the male more or less quadrate, with obtuse 

 angles, of the female broadly rounded or lobate. Cerci not pro- 

 jecting beyond this lamina. Tarsi with distinct pulvilli. The 

 ulnar vein of the wings emitting parallel branches towards the 



dividing vein 4. Subfam. Epilamprin^e. 



2'. The last ventral abdominal segment of the female provided with valves . 5. Subfam. Periplanetin^e. 

 i f . Femora unarmed beneath (A few exceptions). 



1. Supra-anal lamina of both sexes more or less produced, its posterior 

 margin notched. 



3. Claws with a distinct arolium 6. Subfam. Panchlorix.e. 



3 r . Claws without or with a minute arolium. 



4. Wings with a folded fan-like anal field. Pronotum smooth . . 7. Subfam. Blaberin.e. 

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



less pilose 8. Subfam. Corydin.e. 



2'. Supra-anal lamina of both sexes short, transverse, its posterior margin 

 straight or rounded. 

 3. Subgenital lamina of the male somewhat produced, furnished with a 

 single style. Claws with a distinct arolium (except in the genus 

 Paranauphceta) . 

 4. Anterior part of the wings pointed, or the wings with much pro- 

 duced apical field , or wings twice as long as elytra, folded in 

 repose 9. Subfam. Oxyhaloin^e. 



