Bruner: Tropical American Tettigonoidea. 297 



bh. FastiKium of the vertex narrower than the first antennal 

 joint. Tegniina moderately narrowed beyond the 

 middle. The foramina on both sides of the anterior 



tibiae linear Phcebolampta Brunner. 



gg. Posterior margin of the elytra rounded, or elevated, roof- 

 like. Both forks of the branch of the posterior radial 

 vein passing out in the apex of the tegmina. Mesoster- 

 nal lobes strongly compressed. Fastigium of the front 

 bituberculate. Ovipositor obtuse, the valves entire. 



Acra Brunner. 



Genus Euxenica gen. nov. 



The present genus is South American. Thus far only the one 

 species, the description of which follows, is known. This insect, as 

 may be seen by referring to the synojjsis of genera on a preceding page 

 belongs to the first section of the family Phaneropteridae, i. e., among 

 those genera in which the anterior coxae are unarmed with a spine. 

 In the key of genera it falls between Pseudoburgilis Brunner and 

 BurgUis Stal. 



General form of insects moderately graceful. Anterior coxae 

 unarmed with a spine. Head large, a little wider than the anterior 

 margin of the pronotum, the eyes small, but prominent, slightly 

 elongate; occiput smooth, rounded; fastigium of the vertex roundly 

 depressed, narrow, more or less sulcate, sub-contiguous with the 

 fastigium of the front, which latter is bluntly rounded and does 

 not quite reach the upper extremity of the antennal scrobes. An- 

 tennae somewhat coarse, filiform. Pronotum with its sides parallel, 

 carinated, the humeral sinus distinct, but not prominent; the lateral 

 lobes nearly twice as long as high; the disc gently convex, its anterior 

 margin subtruncate, the hind margin rounded. Tegmina as long as, 

 or longer than, the abdomen, lanceolate, their apex acuminate; the 

 anterior and posterior median veins widely separated throughout. 

 Wings wanting. Anterior and middle legs slender, the femora of the 

 former about one-half longer than the pronotum, the median pair a 

 little more than twice its length; hind femora also slender, longer than 

 the body, all three pairs without spines below. Auditory apparatus 

 wide open. Anterior tibiae spined above on their hind margin, the 

 intermediate pair spined on both margins. Ovipositor robust, 

 gently falcate, gradually tapering, acuminate, on the apical third 

 crenulate, or serrate. 



