218 SYSTEMATIC ARRANGEMENT. 



precept was addressed, to whom it would otherwis 

 have heen de ignotis. 



They naturally divide themselves into the followin 

 tribes, to each of which we shall successively adver 

 presenting a view of its general history, and illustra 

 ing it, in most instances, by figures of some of th 

 most characteristic species : Forficulidse, (earwigs, 

 Blattidse, (cockroaches,} Mantidee, (soothsayers 

 walking -leaves,} Phasmidse, (spectres,) Gryllidae 

 (grasshoppers,) Locustidse, (locusts,) Achetidae 

 (crickets.) The first four of these, being all provk 

 ed with feet formed for running, constitute Latreille 

 comprehensive family CURSORI A; the three last, whic 

 have thickened hinder legs adapted for leaping, com 

 pose his family SALTATORIA, 



FAM. FORFICULID^. 



THE forms and appearance of the common earw 

 are so familiar to all, that we have thought it mine 

 cessary to figure any of the species, especially sine 

 they are all very similar to each other ; but as the 

 present several peculiarities in their structure an< 

 habits, it is necessary to give some account of them 

 otherwise our exposition of this order would be in 

 complete. { It has been already mentioned, that th 

 disposition of the wings does not correspond to wha 

 is observed in other Orthoptera, since they are foldec 

 both longitudinally and transversely.* This arrange 



* Although the character afforded by the folding of th 

 wings must be admitted to be a valuable one, its importan 

 is obviously over-estimated when it is regarded as authorisin 



