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1. Head narrower than pronotum; sides of the clypeus keel- 

 ed; last segment of rostrum elongate; pronotum angulately 

 emarginate at t'he base ; tegmina internall_\- widened beyond 



the clavus; first segment of posterior tarsi elongate 



AchUida Stal. 



2. Head narrower than pronijtum; sides of the clypeus not 

 carinate or with an obtuse keel; pronotum most usually 

 angulatel)- emarginate at the base, very rarely roundly sin- 

 uate, tricarinate, lateral keels diverging, most often reach- 

 ing the base ; commissure straight or rounded after the 

 clavus, costa sometimes dilated, costal membrane trans- 

 versely veined; first segment of ]X)sterior tarsi elongate. . . 

 Tropidiuhiiio Stal. 



3. Head most often narrower than the pronotum; sides of the 

 clypeus sometimes carinate; rostrum with the last segment 

 short or very short; pronotum i)Osteriorl\- angulately 

 emarginate, not keeled or -with <Jne obsolescent one; costa 

 simple; posterior tibiae most often unarmed, rarelv s])i- 

 ncse; first segment of posterior tarsi elongate .Drrt /(/a Stal. 



4. Head narrower than pronotum. sides of clypeus keeled; 

 rostrum short, thick, last segment verv short; pronotum 

 truncate basally, disk carinate or lul^erculate; first seg- 

 ment of posterior tarsi strong, less long. .Lophophida Stal. 



5. Head not or little narrower than pronotum; clypeus most 

 often convex, lateral margins ver}- rarely with a keel, pro- 

 notum truncate basally, rarelv widelv roundly sinuate, 

 without a median keel or with an obsolescent one; scutel- 

 lum short, rarely twice as long as the ])ronotum; tegmina 

 coriaceous or subcorneous, rarelv vitreous, verv rarely fiat, 

 more or less convex, sometimes ver\- much abbreviated; 

 first seg-ment of posterior tarsi short or mediocre, very 

 rarely elongate Issida Stal. 



6. Head wide or very wide, sometimes somew'hat narrower 

 than the pronotum; sides of the pronotum most often lack- 

 ing a 'keel; pronotum posteriorly roundly sinuate, lacking- 

 keels or with an obsolescent median one; scutellum ver\ 

 large, costa dilated, costal menibrane transversely veined 

 or reticulate; po.sterior tibiae spinose; first segment of pos- 

 terior tarsi short or rather short Ricaiiiida Stal. 



7. Head a little narrower than pronotum; clypeus lacking 

 lateral keels; pronotum su'btruncate at the base or lightly 

 and widely roundly-sinuate, not keeled or obsolescently so; 

 scutellum large, at least thre<e times as long as pronotum; 

 tegmina very greatly decumbent; posterior tibiae spineless. 

 .-Icaiioiinda Stal. 



