178 THE CANADIAN ENTOMOLOGIST. 



C 2. 



Ovipositor arcuate. 



dT. Ovipositor curved downward; a median 



carina on the prothorax Drymadusa. 



d2. Ovipositor curved upward ; no median 



carina on prothorax Orchesticus. 



b2. Two terminal spines only (the outer) on lower 



side of hind femora Tropizaspis. 



2. Prosternum unarmed. 



bi. Fore tibise spined above on both margins. 



c I. Large bulky insects ; tegmina of $ almost 

 completely concealed beneath the pronotum ; 

 eyes but little larger than antennal scrobes. ... Anabrus. 

 C2. Relatively small insects ; exposed portion 

 of c^ tegmina half as large as prono- 

 tum ) eyes fully twice as large as antennal 



scrobes Cacopteris, p. p. 



b2. Fore tibise spined above on outer margin only. 



ci. Fore tibite with several spines above on outer margin. 

 di. Fore tibiae with three spines above on outer margin, 

 e I.' Legs short, the hind femora scaicely or 

 not extending beyond abdomen ; sur- 

 face of pronotum granulate Peranabrus. 



p 2. Legs long, the hind femora extending far beyond 

 abdomen ; surface of pronotum smooth, 

 r I. Pronotum without distinct lateral carinse, except 

 sometimes posteriorly ] a median carina rarely 

 present and then weak. 



g I. Pronotum transversely arched as much on the 

 posterior as on the anterior half. 



hi. Ovipositor straight Cacopteris, p. p. 



ii2. Ovipositor arcuate Eremopedes. 



5 2. Pronotum laterally subangulate pos- 

 teriorly, and often with a slight me- 

 dian carinula Idiostatus. 



