Bruner: Tropical American Tettigonoidea. 285 



the majority of the present group are denizens of forests, jungles, etc. 

 as well as of grassed and other open country. The various families, 

 which are represented in South America, may be separated by the 

 accompanying sj-noptical key. 



Synopsis of the S. A. TETTiGONomEA. 

 A. Tarsi more or less depressed. (Forms largely winged). 



b. Anterior tibite provided with auditory apparatus or foramina. 



c. First and second tarsal joints smooth, not sulcace laterally. (Hind 



tibiae with an apical spine above on each side) Phaneropteridce. 



cc. First and second tarsal joints longitudinally sulcate laterally. 



d. Foramina or ear of anterior tibiae typically wide open. Prosternum 



armed with a pair of spines or tubercles Mecopodidce. 



dd. Foramina or auditory apparatus either linear or shell-like in its 

 opening. 

 e. Anterior tibiae without terminal spines above. 



/. Antennal scrobes or pits with the margins raised or produced. 



PseudophyllidcB. 

 ff. Antennal scrobes with their margins hardly produced. 



g. Fore, or both front and middle tibiae armed with long 

 spines decreasing in length towards the apex. 



Lislroscelid(B. 



gg. Fore and middle tibiae armed with short or moderately 



long spines. 



h. All the femora unarmed beneath, the posterior ones 



rarely spined on the outer, sometimes on both sides. 



(Size usually smaller) Conocephalida. 



[Xiphidiidce.] 

 hh. All the femora usually spined below, rarely the posterior 

 ones armed only on the outer side, in which case 

 the fastigium of the vertex is either forked or ex- 

 tended considerably beyond the basal joint of the 

 antennae. (Usually larger). 

 i. Fastigium of the vertex generally noticeably nar- 

 rower than the basal joint of the antennae, some- 

 times dorsally sulcate AgycecidcB. 



it. Fastigium of the vertex usually distinctly broader 

 than the basal antennal joint, never sulcate. 



CopiphoridcB. 



[ConocephalincE .] 



ee. Anterior tibiae with a terminal spine above on the outer side. 



First joint of the posterior tarsus provided with a conspicuous 



free plantula beneath Decticidce. 



bb. Anterior tibiae without foramina or auditory apparatus GryllacridcB. 



A A. Tarsi distinctly compressed (forms usually apterous). 



b. Tarsi provided with pulvilli, that on the metatarsus double; inserting angle 

 of the posterior femora situated on the front side StenopelmatidcB. 



