ACEIDIIK&. 209 



spine, shape and distance apart of the meso- and metasternal lobes, and, lastly, colour 

 of body, tegmina, wings, antennae, and hind tibiae. 



Their distribution as a group is general, though a large number of the species 

 which have thus far been recognized are restricted to limited areas. In conclusion, it 

 is but just to add that probably very many undescribed forms still remain to be added 

 to those here recorded. 



The genera may be recognized by the subjoined table : — 



Synopsis of the Genera. 



1 (58). Posterior tibiae provided above with apical spines on both 



margins. 



2 (21). Fastigium of the vertex strongly produced horizontally. 



3 (8) . Frontal costa, viewed laterally, strongly produced between 



the antennae, compressed, below the antennae abruptly 

 lowered. Pronotum in front truncate or emarginate. 



4 (7). Pronotum elevated into a crest, or at least provided with 



a distinct median carina. Posterior femora with the 

 upper carina serrate or denticulate. The spines on 

 the inner side of the posterior tibiae much longer than 

 those on the outer side. 



5 (6). Tegmina with their apices truncate, extending a little 



beyond the tip of the abdomen. Posterior femora 



rather short Procolpia, Stal. 



6 (5). Tegmina with their apices narrowly rounded, reaching 



far beyond the tip of the abdomen. Posterior femora 



long Munatia, Stal. 



7 (4). Pronotum with its median carina obsolete or wanting. 



Posterior tibiae elevated at the base into two acute 

 triangular folds. Tegmina truncate at the apex. 

 Antennae long iEoLACRis, Scudder. 



8 (3) . Frontal costa produced between the antennae, below the 



antennae lower, not abruptly, viewed laterally oblique, 

 but straight or sometimes feebly arcuate-emarginate. 

 Pronotum in front angulately produced. 



9 (10) . Median crest of the pronotum serrate for its entire length . Prionolopha, Stal. 



10 (9). Median crest of the pronotum entirely smooth, sometimes 



crenulate posteriorly, or intersected by the transverse 

 sulci. 



11 (18). Lateral carinse of the pronotum converging in front. 



12 (15). Carinas of the frontal costa below the ocellus parallel or 



only gently divergent. Tegmina variable. 



13 (14). Tegmina and wings complete, equalling or surpassing 



the abdomen in length ; pronotum wholly cristate . . Tropinotus, Serville. 

 biol. centr.-amer., Orthopt, Vol. II., May 1907. 2 Ee 



