366 ON THE ORDERS 



mentioning the difficulty of assigning a place to certain 

 insects which appeared to him to be anomalous, he said, 

 " le rapport qu'a la puce a certains egards avec les scara- 

 hees la feroit mettre a la Jin des animaux de cet ordre" 

 The Suctoria of Degeer are accordingly situated next 

 to the Coleoptera in the Regne Animal. We have thus 

 four examples of insulated points of resemblance being- 

 deemed evidences of affinity. Now, to close this list with 

 a contrary instance of an analogy being correctly taken for. 

 an affinity, I may remark that Mr. Kirby has lately pointed 

 out in the most satisfactory manner, the strong analogy or 

 rather identity of plan which subsists between the mandu- 

 catory organs of some Tineidce, such as the genus Aglossa, 

 and those of Latreille's Plicipennes, constituting part of the 

 new order of Trichoptera. Indeed, in the cases oiAglos&a 

 and Phryganea, the larvae of both these genera live in 

 the water by the aid of similar organs of respiration, and 

 conceal themselves from their enemies in tubes, which 

 they form by the agglutination of various foreign sub- 

 stances. Nor do they accord with each other less in 

 structure when arrived at their perfect state. In short, 

 the particulars of analogy become here sufficiently nume- 

 rous to compose an affinity ; and at length the connexion 

 between the Lepidoplera and Trichoptera is to such a de- 

 gree manifest, that we find it impossible to do otherwise 

 than make this the point of junction between the Mandi- 

 bulata and Haustellata. 



From this point then, as the foundation of our fabric, 

 we may arrange the first mentioned four analogies or 

 insulated resemblances, giving them the situation of cor- 

 responding ganglions in the two series of Winged insects, 

 which differ in their manner of feeding. But no sooner 



