390 SYSTEM OF INSECTS. 
v. Having considered the Orders into which Insecta 
and Arachnida may be divided, I am next to give you 
some account of the groups into which each is further 
resolvable. To draw out, however, a complete scheme 
of these would be deviating from my province, and ex- 
tend this letter to an enormous length. Indeed, to give 
the natural primary and subordinate sections of every 
Order, would require a knowledge of the subject to which 
no Entomologist has yet attained. I shall therefore only 
say something general upon them, and refer you to an 
example of each kind of group. 
Previously to the groups themselves their nomenclature 
claims our attention. M. Latreille in his last arrange- 
ment of Annulose animals has divided his Orders into 
Sections; Families; Tribes; and Genera: his tribes he 
has often further subdivided into lesser sections, repre- 
sented by capital and small letters*. Mr. MacLeay, 
discarding the term section, has Trzbes; Races (Stirps) ; 
Families; Genera, and Subgenera®. But as in descending 
from the Order to the lowest term, or the species, a series 
of groups gradually diminishing in value, which require 
a greater number of denominations than have yet been 
employed by Entomologists, often occur, I think we may 
with benefit to the science add to the list. I would 
therefore propose the following primary and subordinate 
divisions of an Order: 1. Suborder; 2. Section; 3. Sub- 
section; 4. Tribe; 5. Subtribe; 6. Stirps; 7. Family ; 
8. Genus ; 9. Subgenus. I would further propose that 
each of these successive groups should have a name al- 
ways terminating alike, so that the value of the group 
« N. Dict. d Hist. Nat. x. 276. Coléopteres @ Europe, i. 76—. 
5 Annulosa Javaniea, 5. 
