46 GUIDE TO ORTHOPTERA 



e^. Face almost vertical or a little oblique, its angle 

 with the fastigium rarely less than 75° ; eyes rounded 

 oval, never more (generally less) than half as long again 

 as broad ; portion of metasternum lying behind the lobes 

 transverse, more than twice as broad as long ; tegmina 

 normally present. 

 f^. Fastigium of vertex plane or convex ; eyes sepa- 

 rated widely, the space between them twice as broad 

 as the frontal costa ; pronotum furnished with distinct 

 percurrent lateral carinae ; tegmina abbreviate ; cerci 

 apically acuminate. . Paratylotropidia Brunner. 

 f^. Fastigium of vertex more or less depressed or 

 with elevated lateral margins ; eyes separated nar- 

 rowly, at most but little further apart than tlie width 

 of the frontal costa ; pronotum with indistinct * or no 

 lateral carinae ; tegmina fully developed or abbreviate ; 

 cerci variable, rarely acumhiate ai^ically. 



g \ Inferior genicular lobe of hind femora with at 

 least a darker basal spot or transverse band ; cerci 

 of male variable, often enlarging apically. 



h ^. Dorsum of pronotum rarely or never twice 

 as long as the average breadth, generally only 

 half as long again, even in the male, generally 

 constricted more or less in the middle ; antennae 

 even when longest no longer than the hind 

 femora, and only twice as long as the pronotum 

 alone ; face rarely as declivent as in Paroxya ; 

 prozona usually a half longer than the metazona. 

 l \ Head not large in proportion to pronotum, 

 nor prominent, but little longer than the pro- 

 zona, unless the latter is distinctly transverse ; 

 pronotum in no way subsellate, nor flaring in 

 front ; tegmina, when fully developed, narrow, 

 rarely rather broad, but then very distinctly 

 tapering, more or less tapering in distal half, 



* In a few species they are tolerably distinct. 



