HISTORY OF ENTOMOLOGY. 475 



the Acarina, with the exclusion of Hydrachna a . It is 

 remarkable enough that his Class as it stands, with a 

 slight alteration, returns into itself, thus forming a circle; 

 for his first Order (Gnathaptera) contains Hydrachna 

 and the Thysanura, and his last (Aptera] ends with the 

 Anoplura, and Acarina. 



All the French Entomologists have followed Olivier 

 and Latreille in adopting, with some variation, Geof- 

 frey's system with regard to the Coleoptera, which has 

 rendered them all more or less artificial. Dumeril has 

 constructed a table of the Order, arranged differently 

 from that above given b of Latreille; but not more na- 

 tural, for the very same^reason. 



Our learned countryman, Dr. Leach, by his zoolo- 

 gical labours has thrown much light on the natural dis- 

 tribution of the Animal Kingdom, and no department 

 of that kingdom is more indebted to him than the 

 Annidosa ; of which I have before stated to you his 

 Classes c . I shall now give a table of his Orders ofArach- 

 nida and Insecta Latr. and also his families, &c. of his 

 Classes Myriapoda and Arachnides d . 



CLASS. ORDER. FAMILY. 



C Glomerides. 

 Chilognatha ...... < lulides. 



l_Syhgnatha ......... ? Scolopendrides. 



( Geophilides. 



f 

 \ 



a Anat. Comp. i. /. viii. 



b Expos, ffune Meth. Nat. 17. 



c VOL. III. p. 19. 



d Linn. Trans, xi. 376. N. B. I have transferred from the Arach- 

 nida his suborder Notosiomata, as he subsequently placed it at the 

 end of Insecta, under the Omaloplcra. 



