Bruner: Tropical American Tettigonoidea. 293 



straight and sometimes crenulated behind. (Species of 



large size. The tegmina corneous. Ovipositor short, 



somewhat compressed, attenuate, the margins entire.) 



h. Anterior branch of the radial fork itself running out 



at the apex of the tegmina. 



i. Fastigium of the vertex horizontally produced, 



sulcate, a little wider than the first antenna! 



joint. Carinae of the pronotum crenulate only 



on their posterior fourth. . Microcentrum Scudder. 



ii. Fastigium of the vertex deflexed, not sulcate, twice 



as wide as the first antennal joint. Carinae of 



the pronotum ampliated and crenulato-dentate 



throughout Steirodon Serville. 



hh. Anterior branch of the radial fork running out on the 



posterior margin of the tegmina. 



i. Lateral carinae of the pronotum cristato-elevated. 



Anterior tibiae flattened above. (Posterior tibiae 



strongly compressed and dilated . . Peucestes Stal. 



ii. Lateral carinae of the pronotum not elevated. 



Anterior tibiae sulcate above. Eyes globose, 



prominent. 



j. Posterior tibiae alone compressed, and slightly 



dilated near the base Posidippus StaL 



jj. Posterior tibiae as well as the intermediate tibiae- 

 compressed at base and very decidedly dilated. 

 Steirodonopsis Scudder^ 

 hb. Fastigium of the vertex obtuse, deiiexed, much wider than the first joint of 

 the antennae. 

 c. All the femora and tibiae simple or plain. Fastigium of the vertex about, 

 twice the width of the first antennal joint, sulcate. Mesosternum 

 roundly lobate. Ovipositor suddenly curved at its base, a little 

 longer than the pronotum, its upper margin straight. .Sagona Walker.. 

 cc. The femora and likewise the anterior and middle tibiae foliaceo-lobate.. 

 Pronotum with its disc profoundly concave. (Eyes greatly elongate. 



Tegmina very broadly obovate) Agaura Brunner. 



Anterior and intermediate tibiae above rounded, often entirely unarmed, very 

 rarely sulcate, in which case, the apical spine is absent (Viadana), or when 

 the apical spine is present the meso- and metasternum are lengthily lobate 

 {Orophus). Fastigium of the front acuminate, or obtuse. 

 b. Anterior femora often, the middle pair always, rounded beneath, while the 

 hind femora are flattened below. Subgenital plate of male not provided' 

 with styles. Ovipositor frequently much longer than the pronotum, 

 somewhat curved, acuminate, smooth. 

 c. Posterior radial vein with its single branch furcate. Lateral lobes of the 

 pronotum, rounded or obtusely inserted. 

 d. Disc of the pronotum somewhat flattened, without a median elevated 

 longitudinal line. Ovipositor very smooth. . . Anaulacomera Stal. 



