ACRIDIDAE — TETTIGINAE 23 



Tettiginae. 



Of the seven larger groups into which Bolivar divides this 

 subfamily, we possess only two neighboring ones, though two 

 others occur directly south of us. 



Groiqys of Tettiginae. 



a 1. Anterior femora more or less compressed, carinate above ; 

 antennae with 12-14 joints. .... Tettigiae. 

 a"^. Anterior femora distinctly and broadly sulcate above ; anten- 

 nae with 16-22 joints Batrachideae. 



subrectangulate, generally obtuse, the median carina not cristate ; sulci of the pro- 

 zona either obliterated or interrupted on the disk, the posterior of these not or but 

 very slightly recurved, never confluent with the principal sulcus \i. e., that separat- 

 ing the prozona and metazona] ; lateral lobes generally narrowed in passing down- 

 ward, rarely longer than deep, with parallel anterior and posterior margins ; tegmina 

 generally lacking the intercalary vein, the anal and axillary veins generally united at 

 a greater or less distance from the base ; arolia generally of medium size or large ; 

 metasternal lobes not or but slightly separated Tryxalinae. 



Fastigiura of vertex generally strongly declivent, slightly or very slightly prom- 

 inent ; front not or very slightly oblique, generally vertical or subvertical ; eyes 

 generally small or rather small, rarely a little longer than the infraocular portion of 

 the genae; antennae linear or sublinear, generally inserted above the middle of the 

 eyes, sometimes almost above the eyes themselves (plerumque ante medium, interdum 

 fere ante oculos). Pronotum furnished with a median carina often wholly or partly 

 cristate, the metazona typically longer than the prozona, the hind margin generally 

 rectangulate or subrectangulate, the sulci of the prozona either interrupted, or the 

 anterior sulcus alone continuous and bisecting the carina or crest, rarely both con- 

 tinuous, the posterior sulcus recurved and frequently confluent with the principal 

 sulcus ; lateral lobes transverse [i. e., longer than deep] or subtransverse, the front 

 and hind margins parallel or subparallel ; tegmina generally furnished with an inter- 

 calary vein, the anal and axillary veins frequently running free to the margin ; hind 

 femora generally broad, and above and below compressed ; arolia small ; metasternal 

 lobes generally somewhat distant Oedipodinae. 



To this may be added the following from Brunner (R^v. syst. Orthopt., 102, note) :— 



The distinction between the Tryxalinae and Oedipodinae is somewhat arbitrary and 

 rests on individual perception (I'estimation personelle). When, however, the relative 

 position of the front and the vertex [on which he rests his tabular distinction] leaves 

 one in doubt, the presence or absence of foveolae may guide one, Tryxalinae having 

 in this case very distinct foveolae, while in the Oedipodinae they are effaced. More- 

 over the species here taken with consideration, when they are Tryxalinae, have the 

 mediastinal and scapular areas of the tegmina regularly reticulate by transverse 

 veinlets ; while, if they are Oedipodinae, these areas are always very irregularly 

 reticulated. 



See also McNeill's paper on Tryxalinae (pp. 181-182) for a tabulation of differences 

 between the Tryxalinae and Oedipodinae. 



