20 DEFINITION OF THE TERM INSECT. 
Porcellio Latr. to Iulus*, which begins his Ametabola : 
these he connects with the Mandibulata, by Nirmus, 
which he thinks approaches some of the corticarious 
Coleoptera». 'This class he appears to leave by the T77- 
choptera Kirby, and so enters his Haustellata by the 
Lepidoptera, and leaves it again by the Dzptera by 
means of the Pupipara, especially Nycteribia, connecting 
this class with the Arachnida, which he enters by the 
Hexapod Acari L.*, and these last he appears to leave 
by the Araneide, and to enter the Crustacea by the De- 
capods*: thus making good his circle of classes, or a 
series of Annulose animals returning into itself. Mr. 
MacLeay’s whole system upon paper appears very har- 
monious and consistent, and bears a most seducing aspect 
of verisimilitude; but it has not yet been so thoroughly 
weighed, discussed, and sifted, as to justify our adopting 
it 22 toto at present: should it, however, upon an impartial 
and thorough investigation, come forth from the furnace 
as gold, and be found to correspond with the actual state 
of things in nature, my objections, which rest only upon 
some parts of his arrangement of Annulosa, would soon 
vanish. Some of those objections I will state here, and 
some will come in better when I treat of the Systems 
of Entomology. My first objection is, that his Ameta- 
bola, Mandibulata, and Haustellata, approach much 
nearer to each other than they do to the other two classes 
of his circle, or than even these last to each other; so 
that under this view it should primarily consist of three 
greater groups, resolvable, it may be, into five smaller 
ones. My next objection is, that he has also considered 
a Hor. Entomolog. 348. 6 Tbid. 354. © Ibid. 373. 
* Thid. 381. * Ibid. 389. 
