2 ORTHOPTERA 



than one species in other genera of the subfamily. The genus Nothoblatta of Bohvar does not seem to be 

 a Phyllodromine as suggested, for the femora are entirely unarmed beneath. Both Ellipsidion and 

 Ischnoptera grade into Phyllodromia in the most confusing manner. To add to the perplexities of the 

 systematic worker in this group, the subfamil}' itself is not well-marked off from the Ectobiinse. The 

 characters presented by the wing-venation, the armature of the femora and the form of the supra-anal 

 lamina are most untrustworthy guides on account of the protean variation that they exhibit. In a 

 previous communication (Trans. Ent. Soc. Lond. p. 23 1, igo6) I expressed the view that the only 

 crucial difference between the two subfamilies was the ramose ulnar vein of the wings in the Phyllo- 

 dromiinae and the simple ulnar vein in the Ectobiins, but even this character is unreliable, for in 

 Ceratinoptera, a characteristic Phyllodromiine genus, as shewn by the membranous ootheca of some 

 species, the ulnar vein of the wing is simple. To put the matter briefly, this subfamilj' is full of interest 

 for the evolutionist, but it is the despair of the systematist. 



KEY TO THE GENERA 



I . Eyes toell-devcloped. 

 2. Eyes not joined on vertex of the head. 

 3. Genital styles of male not bifurcate at apex. 

 4. Arolia present between the tarsal ehnvs. 

 5. Tegmina exceeding the apex of the abdomen, usually consi- 

 derably so. 

 6. Ulnar veins of tegmina angulaie. (Antenna incrassated 

 and plumose). 



7. Anterior ulnar vein of tegmina simple i. Genus Pseudomops, Serville. 



7'. Anterior ulnar vein of tegmina biramose 2. Genus Pseudothyrsocera, Shelford. 



6'. Ulnar veins of tegmina not angled (i). 

 7. Ulnar vein ofiinngs sending branches to dividing vein. 

 8 . A ntennce incrassated and hirsute . 

 g. Pronotum discoidal, mid- and hind-femora unarmed g. Genus Caloblatta, Saussure. 

 g'. Pronotum trapezoidal, mid- and hind-femora armed 10. Genus Pseudisciinoptera, Saussure. 

 8'. Antennae not incrassated nor hirsute. 



q. Femora strongly armed beneath 5. Genus Ischnoptera, Burmeister. 



9'. Femora zceahly armed beneath. 

 10. Tegmina narrow, overlapping considerably ... 7. Genus Chrastobi.atta, Saussure & 



[Zehntner. 

 10'. Tegmina broad, not overlapping considerably . . 8. Genus Piroblatta, Shelford. 

 7 ' . Ulnar vein of wings not sending branches to dividing vein . 

 8. Antenntr incrassated a)id hirsute. 

 g. Tegmina corneous, their venation obscured .... 3. Genus Pachnepteryx, Brunner von 



[Wattenwyl. 

 g'. Tegmina coriaceous, their venation not obscured . . 4. Genus Ellipsidion, Saussure. 

 8'. Antenna not incrassated nor hirsute. 

 9. Head very broad. 



10. Anterior field of tegmina very broad 18. Genus Macrophyllodromia, Saussure 



[& Zehntner. 



(l) Except in a few species of IscJinvpleta. 



