include the ^geriae, is merely that relation of imago which I have 

 before so repeatedly pointed out. The situation, which without 

 this genus must have been vacant, thus filled, gives us a most 

 perfect chain of families throughout the order, except at the point 

 of connexion with Phalaena, a point of no consequence, because 

 it too much favours old theories to be contested. 



It is rather remarkable, that in this order no instance should 

 occur of more than three genera belonging to any one family, a 

 number which I should hardly suppose complete, because a diffi- 

 culty must always occur in placing, as in discovering the typical 

 genus or species, where the number is confined to three. 



The introduction of a new generic name, after what has been 

 said on that subject, may appear rather an inconsistency, but I 

 found it indispensable, as the species in question would not bend 

 to either of the established genera, Trochilium or ^Egeria ; it will, 

 moreover, afford those whose labours in this way I have some- 

 what deprecated, a fair opportunity for retaliation. The families 

 and their relative situations, as far as my immature and hastily- 

 formed judgment will allow me to decide, I have shown in the 

 annexed diagram : but it is now time for me to describe the 

 species whose situation I am endeavouring to point out. 



Sub-kingdom, Insecta. 



Characters from the imago. 



The body is divided into three parts, head, thorax, and abdo- 

 men ; the head has two fixed compound eyes, and two moveable 

 antennae. Insects have six jointed legs in pairs ; they breathe 

 by lateral spiracles. 



Class, Lepidoptera. 



Characters from larva, pupa, and imago. 



Larva polypod, bears no resemblance to the imago ; pupa qui- 

 escent, bears no resemblance to the imago. Imago has four scaly 

 wings, and the mouth aglossate or antliate. 



Sub-class, PuALvENiE (central). 



Characters from larva, pupa, and imago. 



All varying (the universal character of such central groups). 



Natural order, Cossi. 



Characters from the larva and pupa. 



Larva depressed, kaned; has sixteen feet, lives through one or 



