INSECTA 75 



7 (8) Antennae much shorter than the body; calling organs of male, 



when present, on the hind femora and lower border of first 

 pair of wings; organs of hearing, when present, on the basal 

 segment of abdomen; ovipositor short .... Family, Acrididce. 



8 (7) Antennae much longer than body, tapering; calling organs of 



male, when present, on the dorsal surface of the first pair of 

 wings; organs of hearing, when present, on the tibiae of the 

 first pair of legs; ovipositor a long blade or needle 9 



9 (10) First pair of wings slope down from the dorso-median line; 



ovipositor compressed and sword-like .... Family, Locustidce. 

 10 (9) First pair of wings flat above, the sides bent abruptly down- 

 ward; ovipositor a cylindrical, straight, or slightly curved 

 needle, usually enlarged at the tip Family, Gryllidce. 



