234 PSYCHE. [juiy ,8,8. 



/'. Head somewhat ascending ; antennae of very unequal 

 length in the two sexes ; pronotum with no lateral carinae, 

 the median carinae obsolete on the prozona ; scapular 

 area of $ tegmina conspicuously expanded, so as to make 

 the costal margin sinuate (Bootettiges) . Bootettixlixnvit'!:. 

 /-. Head generally salient, rarely at all ascending ; an- 

 tennae subequal in the two sexes ; scapular area of male 

 tegmina not or but little, rarely at all conspicuously, ex- 

 panded, never considerably disturbing the regular curve 

 of the costal margin. 



g^. Antennae distinctly flattened (except in Ambly- 

 tropidia), rather short*; fastigium usually rotundate 

 without distinct lateral costulation or, if distinct, then 

 with a distinct median carina, generally continuing 

 over the occiput, sometimes there accompanied by a 

 pair of eubmedian carinae ; face strongly or rather 

 strongly oblique ; lateral carinae of pronotum usually 

 parallel but sometimes converging mesially but without 

 any, or but the faintest, constriction of the body of the 

 pronotum (Amblytropidiae) . 



// ^ Disk of pronotum more or less clepsydral, 

 the lateral carinae converging near the middle 

 so as to be there nearer together than at either 

 the front or hind margin. 



/^ Apical spurs on inner side of hind tibiae 

 very unequal in length. 



/'. Antennae apically clavate; lateral 

 carinae of pronotum subparallel ; teg- 

 mina as long as abdomen. 



Eriiettix Bruner. 

 j'^. Antennae apically attenuate though 

 blunt ; lateral carinae of pronotum con- 

 siderable arcuate ; tegmina abbreviate. 

 k '. Hind margin of pronotum an- 

 gulate or rotundato-angulate ; pro- 

 zona but little longer than metazona. 

 Mesochloa n. g. (Note 3). 



