Zoraptera — Isoptera — Corrodentia. 17 



W— ORDER ZORAPTERA. 



Minute, wingless, agile, terrestrial, predatory species. Body 

 flattened, head somewhat inclined, antennae moniliform, nine- 

 jointed, mandibles strong, eyes vestigial; thorax as long as the ab- 

 domen, prothorax large; abdomen with ten segments, cerci one- 

 jointed; legs similar, formed for running, tarsi two-jointed. 



One family, ZOROTYPID.S, restricted to tlie East Indies. (PL 2, fig. 26.) 



^ ORDER ISOPTERA. 



Small to middle-sized, elongate, feeble insects living in colonies 

 and occurring as sexual individuals, soldiers and workers; usually 

 with weak chitinization. Head large, free, rather vertical, eyes 

 and ocelli present or absent, mandibles often large, antennae 

 filamentous; prothorax large, free; legs similar, formed for run- 

 ning, tarsi apparently four-jointed; wings similar, narrow and 

 long, superimposed over the abdomen, soldiers and workers wing- 

 less; cerci short. Metamorphosis very imperfect. White ants, 

 Termites. 



Tarsi with an apiral sole-like pad; eyes present, mandibles toothed; pronotum 

 flat; wings reticulate; fontanel absent. (Termopsis, Calotermes.) 



PROTERMITIDiE 



Plantula absent; mandibles not strongly toothed; pronotum convex; wings not 

 strongly reticulate; vertex with fontanel. (Termes, Eutermes.) (PI. 2, figs. 24, 

 27, 28.) {METATERM1TID.E) TERMITIDiE 



ORDER CORRODENTIA. 



(PSOCOPTERA, COPEOGNATHA.) 



Small or minute, mandibulate insects with long slender antennae, 

 the body rather stout, the prothorax small, tarsi two- or three- 

 jointed. Metamorphosis incomplete. 



Wings well developed; ocelli present. Bark living insects. (Caecilius, Psocus.) 

 (PI. 2, fig. 29.) PSOCIDyE 



Wings absent, or at most a single small pair of mesothoracic wings present; ocelli 

 absent. (Troctes, [T. divinatbria. Book-louse], Atropos, Psocinella.) (PI. 

 2, fig. 30.) ATROPIDiE 



