Zoraptera Isoptera Corrodentia. 1 7 



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, pro thorax large; abdomen with ten segments, cerci one- 

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



One family, ZOROTYPID^, restricted to the 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; pro thorax 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 apical sole-like pad; eyes present, mandibles toothed; pronotum 

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



PROTERMITIDjE 



Plan tula absent; mandibles not strongly toothed; pronotum convex; wings not 

 strongly reticulate; vertex with fontanel. (Termes, Eutennes.) (PL 2, figs. 24, 

 27, 28.) (METATERMITIDJE) TERMITIDJE 



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. (Csecilius, Psdcus.) 

 (PL 2, fig. 29.) PSOCIDjE 



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

 absent. (Tr6ctes, [T. divinatbria, Book-louse], Atropos, Psocinella.) (PL 

 2, fig. 30.) i ATROPHY 



