(a 
other respects. He limited his use of the nervures to 
those placed beyond the stigma, (pl. 1, fig. 1, s.) and which 
are dotted in the second figure of the first plate and the 
spaces or cells formed by them, marked 5, 6, 7, 8 and 9, in 
the first figure of the same plate.* The names which he 
applied to the genera thus distinguished have not been 
allowed always to stand, owing to the too rigid application of 
the law of priority, which retained the names of Fabricius and 
Latreille, &c. to the conglomerate genera they had formed, 
when their types were subsequently discovered to be iden- 
tical with any of the insects contained in the genera con- 
structed by him. But this he can well afford, for his fame 
is permanent. No subsequent discovery has as yet invali- 
dated his system when rigidly applied, although sometimes 
in exotic genera it derives perspicuity from other external 
characters, viz. from general habit, the form of the eyes, 
&c. &c. Latreille’s merits have been considerably obscured 
by the publication of the preceding work, which lent its 
lustre to all his subsequent performances. St. Fargeau’s 
generic descriptions in the work above mentioned merit 
great praise, and the introductory remarks of Mr. Kirby 
will be found exceedingly instructive. For the description 
of species we must cite Vander Linden. He first has drawn 
the attention of Entomologists to the value of sculpture as 
a specific distinction in this tribe, and by means of which 
the confusion that has hitherto prevailed as to the specific 
identity or differences of these creatures promises to be re- 
moved. Colour has hitherto been resorted to as the best 
specific character, but it is of so variable a nature in the 
majority, that I have not found it safe to depend upon: I 
* See below for the detailed nomenclature of the nerves and cells of the 
wing, which I have extracted from my paper to be published in a forthcoming 
number of the Entomological Transactions. 
