TABLE OF FAMILIES OF ORTMOPTERA. 83 



B. Anterior wings leathery, ver^^ short, without veins, 

 meeting in a straight line; posterior wings, when 

 present, folded to the middle of the anterior mar- 

 gin ; tarsi three- jointed, the pulvillus wanting; 

 cerci horny, resembling forceps. 1. PorHculidas. 

 BB. Anterior wings parchment-like, thickly veined; 

 posterior wings folded to the base; tarsi five- 

 jointed; cerci soft, jointed or without joints. 

 C. Body oval, depressed; head wholly or almost 

 wholly withdrawn beneath the pronotum ; 

 pronotum shield-like, transverse; legs com- 

 pressed; cerci jointed; rapidly running insects. 



2. Blattidse. 

 CC. Bodv elongated; head free; pronotum elon- 

 gated ; legs slender, rounded ; cerci jointed or 

 without joints; walking insects. 



D. Front legs fitted for grasping; cerci jointed. 



3. Mantidse. 

 DD. Front legs simple; cerci without joints. 



4. Phasmidse. 

 AA. Posterior femora fitted for jumping, i. e. very much 

 stouter or very much longer, or both stouter and 

 longer that the middle femora; ovipositor horny, 

 free (except with the Mole crickets); organs of flight 

 of immature forms inverted ; stridulating insects. 

 B. Antenn£E short ; tarsi three-jointed ; supposed or- 

 gans of hearing situated in the first abdominal 

 segment; ovipositor short, composed of four sep- 

 arate plates; stridulating organs situated in hind 

 femora and the costal area of the tegmina. 



5. Acrid id se. 

 BB. Antennae long, setaceous ; tarsi four or three- 

 jointed; supposed organs of hearing situated in 

 the anterior tibiae and also in the prosternum; 

 ovipositor elongated (except in the Mole crick- 

 ets); composed of four connate plates. 



