2, Dr, Lishtens-tein's Bijfcrtaiion on two Natural Genera . 



^dded to our knowledge of Infe6ls within thefe twenty years by him- 

 felf and other active naturahfts ! And yet we are ftili very far from 

 having a proper natural arrangement and defcription of all the orders 

 and genera. I fhall fay nothing of the fpecies ; for here, efpecially 

 through theimperfe6lion and frequent incorreclnefs of the fynonyms, 

 fo much confufion prevails, that it is often difficult to afcertain to 

 what fpecies of Linne or Fabricius a perfe6lly common indigenous 

 inie£t belongs. If a genus be truly natural, or, as logicians call it, 

 2i genus proximum, a fmgle charadleriftic is almoft ahvays fufficient to 

 determine with certainty to what fpecies an individual of this genus 

 is to be referred. The prefent attempt jnay ferve as a fpecimen of 

 the manner in which I conceive that ftill greater genera ought to be 

 treated according to the natural diftinclions ; fixing the natural ge- 

 nera where the fyflem has not already done it, and placing the 

 fpecies in order under appropriate fubdivifions taken from elTential 

 differences ; defcribing them, with accuracy, and particularly adding- 

 the fynonyms as completely and correctly as poflible. 



The idea of feparating from the -proper Mantes thofe fpecies feedin^^ 

 on plants, that have no falciform fore-feet, but have all their leo-s 

 formed for running, and making a new genus of them, is by no 

 means of my invention. Cafpar StoU has already propofed it, but 

 has not at all carried it fyftematically into effect* The fplendid 

 work which this zealous entomologift had begun to publiili at Am- 

 ilerdam in 1787 with a Dutch and French text, under the title of 

 'NaiuurlyJie, en naart leeven nauwkeurig gekleurde j^fbeeldingen^ en Be- 

 fchryvingen der Spochn, Wandelnde Bladen^ Zahelfpringhanen^ Krekcls^ 

 'Trekjprlnghaanen en Kakkerlakkeny in quarto, fold by J. C. Sepp, was in- 

 terrupted by death, which cut off this gentleman (who, with many 

 peculiarities, had yet undeniably great merit) in the middle of his 

 caixcr. Had he lived longer, this work o^ the Uhn^taof Fabricius 



would. 



