34 GUIDE TO ORTHOPTERA. 



d 1 . Antennae very short, stout; head compressed, the 

 fastigium prominent, angulate. Chimarocephala Scudder. 

 d' 2 . Antennae rather long, slender ; head subtumid, rotun- 

 date, the fastigium in the female anteriorly obtuse. 



Encoptolophus Scudder. 



A 2 . Interspace between the metasternal foramina rather broad, 

 in the male quadrate, in the female transverse. 



b l . Lateral canthi of the metazona traversing the principal 

 sulcus (where they are frequently cristulate or rugose), not 

 intersected by that sulcus (or only in individual cases); princi- 

 pal sulcus more or less obsolete or delicate in the lateral lobes. 

 c l . Carina of pronotum conspicuous ; tegmina with moder- 

 ately dense reticulation, at least the apical third remotely and 

 quadrately reticulated. 



d l . Smaller forms. Pronotum not rugose ; wings sub- 

 vitreous, the area of the median forks obscurely divided or 

 with only one row of areoles. . . Camnula Stal. 

 d 2 . Larger forms. Pronotum rugose ; wings colored, the 

 area of the median forks divided for the larger part by a 

 spurious vein, and so biareolate. HRppiscus Saussure. 



c 2 . Carina of pronotum very slight; nearly the whole of the 

 tegmina densely reticulate and coriaceous, only membrana- 

 ceous or subvitreous at extreme tip. 



d 1 . Less stout ; mesosternum only a little broader than the 

 head ; tegmina extending well beyond tip of abdomen, the 

 intercalary vein distinct throughout and everywhere very 

 much nearer the median than the ulnar vein ; transverse 

 fascia of wings with no subcostal taenia ; posterior process 

 of pronotum acutangulate. . . Leprus Saussure. 

 d 2 . Exceptionally stout; mesosternum fully half as broad 

 again as head ; tegmina leaving tip of abdomen exposed, 

 the intercalary vein more or less obscure proximally and 

 only a little nearer the median than the ulnar vein ; trans- 

 verse fascia of wings with distinct subcostal taenia ; 

 posterior process of pronotum rectangulate. 



Agymnastus Scudder. 



