32 OETHOPTERA. 



d. Antennae not apically clavate. 



e. Face considerably oblique, straight or but little 

 rounded ; lateral foveolae of vertex linear or trian- 

 gular ; lateral lobes of pronotum longer than or fully 

 as long as deep. 

 /. Fastigium with a distinct percurrent median carina ; 

 antennae, at least in female, depressed and more or 

 less expanded basally. 

 g. Antennae much expanded basally, tapering ; lateral 

 carinae of pronotum subparallel, the disk sub- 

 rectangular Napaia, McNeill. 



gg. Antennae feebly expanded basally, subfiliform; 

 lateral carinas of pronotum strongly sinuate, the 

 disk clepsydral. 

 h. Tegmina and wings fully developed, reaching 

 beyond tip of abdomen ; antennae much shorter 

 than hind femora; longitudinal carinae of fasti- 

 gium continued upon the occiput; eyes piriform, 



not prominent Horesidotes, Scudder. 



hh. Tegmina much abbreviated, scarcely half as long 

 as abdomen ; antennae nearly or quite as long as 

 hind femora ; longitudinal carinae of fastigium 

 not continued upon the occiput; eyes subglo- 

 bular, prominent . . . . . . . . . . Melanotettix, Bruner. 



ff. Fastigium with no median carina, but at most a 

 coloured line, except sometimes in the extreme an- 

 terior portion; antennae filiform, the basal joints 



neither expanded nor greatly depressed in either sex. Stenobothrus, Fischer. 

 ee. Face little oblique, strongly rounded ; lateral foveola? 

 of vertex moderately wide, never more than twice 

 as long as broad; lateral lobes of pronotum deeper 

 than long. 



dd. Antennae apically clavate Gomphocerus, Thunberg. 



cc. Inner apical spurs of hind tibiae usually very unequal in 

 length, the inferior twice or nearly twice as long as the 

 superior; apical portion of scapular field of <$ tegmina 

 but little dilated, so that the broadest part of the tegmina 

 lies at the middle. (ScyllinjE.) 

 d. Median carina of pronotum as distinct on prozona as on 

 metazona, cut only by the principal sulcus. 

 e. Fastigium of the vertex without or with suppressed 

 lateral ridges ; the head usually large and lacking 

 sharp carinae ; tegmina and wings never complete : 

 insects rather large, above the average in size . . . Boopedon, Thomas, 

 ee, Fastigium of the vertex with distinct lateral ridges; 



