ORDINES INSECTORUM. 21 



which he has divided into three articles : The 

 firft, containing thole infects whofe elytra are 

 cruftaceous or horny, and cover the abdomen 

 entirely : The fecond, thofe whofe elytra are 

 likewife cruftaceous, but cover only a part of 

 the abdomen : The third, thofe whofe elytra are 

 ofafofter fubftance than the foregoing ones, 

 and almoft membranaceous ; This lad article 

 comprehends fuch of the Linnsean Infefia Hemip- 

 tera as have the elytra, femi cruftaceous in the 

 whole length, or lefs hard, than thofe of the 

 Celeoptera, and the mouth furniftied with jaws, 

 as the gryllus, orgrafshopper,&c. This fection is 

 farther divided into orders, from the number of 

 articulations found in the feet of the different 

 infects which compofe it. 



His fecond fection, or, Infcfta Hemtptera* 

 contains fuch of Linnseus's Hemiptera, as have 

 elytra femi-cruftaceous only to a certain diftance 

 from their bafe, as the Cimex or Bug, &c. but as 

 this fection, in which he has attempted to correct 

 Linnseus, I think with fuccefs, would ftill, in 

 that fituation, have remained very incompleat, 

 the Kermes and Coccus which he had referred to 

 it, having only two wings, and thofe of the 

 Pfylla and Aphis being all four equally coria- 

 ceous ^ he has taken his effential character frm 

 the probofcis or roftrum, with which the mouths 

 of all the infects that compofe it are furniihed. 



B 3 This 



