218 
SYSTEMATIC ARRANGEMENT. 
precept was addressed, to whom it would otherwise 
have been de ignotis . 
They naturally divide themselves into the following 
tribes, to each of which we shall successively advert, 
presenting a view of its general history, and illustrat- 
ing it, in most instances, by figures of some of the 
most characteristic species: — Forficulidce, (earwigs,') 
Blattidee, (cockroaches,) M ant idee, (soothsayers or 
walking -leaves,) Phasmidte, (spectres,) Gryllidee, 
(grasshoppers,) Locustidee, (locusts,) Aclietidse, 
(crickets.) The first four of these, being all provid- 
ed with feet formed for running, constitute Latreille’s 
comprehensive family Cursori a; the three last, which 
have thickened hinder legs adapted for leaping, com- 
pose his family Saltatoria. 
Fam. Forficulid,®. 
The forms and appearance of the common earwig 
are so familiar to all, that we have thought it unne- 
cessary to figure any of the species, especially since 
they are all very similar to each other ; but as they 
present several peculiarities in their structure and 
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 the 
disposition of the wings does not correspond to what 
is observed in other Orthoptera, since they are folded 
both longitudinally and transversely.* This arrange- 
* Although the character afforded by the folding of the 
wings must be admitted to be a valuable one, its importance 
is obviously over-estimated when it is regarded as authorising 
