240 ORTHOPTERA chap. 



extreme difference in the organisation of the two sexes of many 

 species. It has, however, been brought to a fairly satisfactory 

 state by the reiterated labours of Brunner von Wattenwyl, and 

 we reproduce his recently perfected exposition of their characters. 

 His first division is made by means of a structure which is very 

 easily observed, viz. whether the femora are armed with spines, 

 as in Fig. 134, or not. The terms used in connexion with the 

 wings and other parts of the body we have already explained. 



Brunner's system is adopted by de Saussure,^ who, however, 

 proposes to replace the names Ectobiides and Oxyhaloides by 

 Anaplectinae and Plectopterinae, He also proposes to apply the 

 generic name Blatta to the Insect that is now so frequently called 

 Phyllodroinia germanica in zoological works. If that view b^ 

 adopted, Brunner's group Phyllodromiides will be called Blattides, 



Table of the tribes of Blattidae, after Brunner : 



1. Femora spiny beneatli.^ 



2. The last ventral plate of the female large, without valves. 



3. Supra-anal lamina of both male and female transverse, narrow. 

 Wings, when present, furnished with a triangular apical field. 

 Posterior femora unarmed beneath, or armed with two spines on 

 the anterior margin. Egg-capsules furnished with a longitudinal 

 suture. Tribe 1. Ectobiides. [Anaplectinae Saussure.] 

 3'. Supra-anal lamina of each sex more or less produced, triangular, 

 or emarginate. Wings, when present, without apical field. Pos- 

 j [ terior femora with both edges spiny. 



' / '4. Supra-anal lamina of each sex triangular, not notched. Cerci 

 projecting much beyond this lamina. 



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 pro- 

 jecting beyond the lamina. (Tarsal joints with distinct pads.) 

 Ulnar nervure of the wings giving off parallel branches towards 

 the vena dividens. Tribe 4. Epilamprides. 



^ JBiol. Centr.-Amer. Orthoptera, 1893. 



2 Although the genus Chorisoneura has unarmed femora, it must be placed in this 

 division. 



