44 MODERN CLASSIFICATION OF INSECTS. 



3. Pseudotetramera* (or Subpentamera, Tetramera Latreille, Crypto- 



pentamera Biirm.), in which the tarsi are 5-jointed, but the 

 fourth joint is exceedingly diminutive, and concealed between the 

 lobes of the preceding. 



4. Pseudotrimera (or Subtetramera, Tetramera Latr., Cryptotetramera 



Burm.), in which the tarsi are 4-jointed, the third joint being 

 very diminutive, and concealed between the lobes of the pre- 

 ceding. 



Sect. i. PENTAMERA. 



It is observable that although Linnteus and Latreille considered very 

 different groups as entitled to precedence amongst Beetles, by both 

 Pentamerous insects were selected as fitted to commence the classi- 

 fication of the order ; the former, probably influenced by their su- 

 perior size and strength, employing the giant Lamellicorns for that 

 purpose ; and the latter, in consequence of the superior developement 

 of the manducatory organs and their agility, together with their internal 

 organization, giving the precedence to the predaceous Tyger-beetles-j- 

 and Carabi. Mr. MacLea}^, indeed, does not consider the latter in- 

 sects as entitled to peculiar rank on these grounds ; and, in fact, it 

 only becomes a matter of importance with what insects we ought to 

 commence our arrangements, when we have ascertained what are the 

 precise animals composing the group immediately connected with or 

 preceding them in a natural system, and by means of which the most 

 easy passage between the two groups can be effected. 



The section Pentamera seems to be divisible into two tribes, cor- 

 responding with Mr. MacLeay's groups Chilopodomorpha and Chi- 

 lognathomorpha. I retain them, however, as merely provisional. 



The tribe Chilopodomorpha, in like manner, seems to be divisible 

 into two subtribes, viz. : — 



1. The Adephaga ClairviUe. 



2. The Rypophaga Stephens. 



The former, constituting the more typical portion, is again divisible into 



* I had elsewhere proposed the terms Subtetramera and Subtrimera for Latreille's 

 Tetramera and Trimera ; but as the preposition sub Implies a deduction from the 

 quality of the word to which it is prefixed, and as these two groups require, in effect, 

 a designation implying a slight addition to the character originally imputed to tliem, 

 I have proposed for them the terms of Pseudotetramera (or Subpentamera), and 

 Pseudotrimera (or Subtetramera). 



f See ante, p. II. note*, p. 38. and Dahlbom, Clavis Nov. Hym. Syst. Pra:- 

 mon. p. iv. 



