192 
PLATYSTERA. 
This comparison must speak for itself. Haying 
already shewn that the sub-genera in the last column 
represent the genera of the sub-family Muscicapinae, 
and that there, again, are' representations of the 
primary divisions of all birds, we know not how 
demonstration can he carried further. We think 
the complaint, in this instance at least, formerly 
brought against ns, of making assertions instead of de- 
monstrations, will be thought somewhat premature : 
seeing that a proposition must be first made, before 
the drift of the evidence to he adduced in its support 
can be well understood. We shall, therefore, now 
close this analysis of the genus Todus, and com- 
mence a survey of the last and most typical group 
of these insectivorous birds. 
The genus 
